Usage
3.1. To Use Calculator Functions
To perform a calculation, use one of the following methods:
- Click on the gcalctool buttons to enter numbers and functions.
- Give focus to the gcalctool window, then use the keyboard or numeric keypad to specify the calculation that you want to perform. For a complete list of keyboard shortcuts, see Section 5 ― Quick Reference: Keyboard Shortcuts.
The gcalctool application automatically displays numbers with more than 40 digits, and small numbers, as exponential numbers. For example, the following table shows the value that is displayed when you use the decimal numeric base with an accuracy of 2 significant places:
| Display | Signifies |
|---|---|
| 1.23e+37 | 1.23 * 1037 |
| 1e-5 | 0.00001 |
For information about how to enter a number in exponential format, see Section 3.5.7 ― To Enter Exponential Numbers.
3.1.1. To Display a Separator in Large Numbers
To insert a separator between every three digits to the left of the numeric point in decimal base, choose .
Different countries and cultures have varying conventions for how to communicate. These conventions include the language spoken and the character used as a numeric separator.
gcalctool has been internationalized so users can adapt to their own conventions. This is done by setting a specific locale. We can't determine what locales will exist, except for a standard one called the C locale.
When you use the C locale, the separator character is not displayed.
3.2. To Perform Basic Calculations
Basic mode is displayed by default when you first start gcalctool. To explicitly invoke Basic mode, choose .
The calculator memory registers are unavailable in Basic Mode. In other words, is inactive.
- 3.2.1. To Perform Simple Calculations
- 3.2.2. To Erase Characters
- 3.2.3. To Display ASCII Values
3.2.1. To Perform Simple Calculations
To perform simple calculations, use the buttons described in Table 1.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Numerals | to inclusive | In decimal and hexadecimal base, all numerals are available. In octal base, and are unavailable. In binary base, only and are available. The default base is decimal. | 1 | |
| Numeric point | Starts the fractional part of a numeric entry. | 1.2 | ||
| Calculate a result | Displays the result of the current calculation in the current base. | 1 | 3 | |
| Addition | Adds the current value in the display area to the next number that you enter. | 1 | 3 | |
| Subtraction | Subtracts from the current value in the display area the next number that you enter. | 3 | 1 | |
| Multiplication | Multiplies the current value in the display area by the next number that you enter. | 3 | 6 | |
| Division | Divides the current value in the display area by the next number that you enter. | 6 | 2 | |
| Change the arithmetic sign | Changes a positive number to a negative number, or a negative number to a positive number. | 8 | -8 |
3.2.2. To Erase Characters
To erase characters, use the buttons described in Table 2.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Backspace | Removes the rightmost character from the display area. | 1 | 3 | |
| Clear Entry | Removes the current value from the display area. This operation is the same as | 1 | 0 | |
| Clear | Resets the current value in the display area to zero and removes any previous calculation results. also deselects the Hyp and Inv options in Scientific. | 1 | 0 |
3.2.3. To Display ASCII Values
To display the ASCII value of a character, choose .
The Insert ASCII Value dialog is displayed.
Enter the required character in the Character field, then click . The ASCII value of that character, in the current numeric base, appears in the display area. For example, the ASCII value of B in decimal base is 66.
3.3. To Perform Advanced Calculations
To change to Advanced mode, choose .
When you change to Advanced mode, the following buttons are displayed to the right of the Basic mode buttons:
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Percentage | Divides the current value by 100. | 560 | 5.60 | |
| Reciprocal | Divides 1 by the current value in the display area. | 4 | 0.25 | |
| Square Root | Calculates the square root of the current value in the display area. | 9 | 3 | |
| Square | x2 | Calculates the square of the current value in the display area. | 3 x2 | 9 |
| Integer Portion | Calculates the integer portion of the current value in the display area. | -23.45 | -23 | |
| Fractional Portion | Calculates the fractional portion of the current value in the display area. | -23.45 | -0.45 | |
| Absolute Value | Calculates the absolute value of the current value in the display area. | -23.45 | 23.45 | |
| Parentheses | and | Calculations within parentheses are performed first. You can nest parentheses to any level. |
2 2 | 20 14 |
3.3.1. To Use the Calculator Memory Registers
You can store values in any of the ten gcalctool memory registers R0 to R9. To display the memory registers, choose .
The memory registers can be dismissed by either choosing again, or by clicking on the button in the memory register window.
Table 4 describes the memory functions that you can use.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Store Value in Memory Register | Stores the current contents of the display area in the specified memory register. Click , then select a memory register from the popup menu. To clear a memory register during a gcalctool session:
| 22 R2 | The value 22 is stored in memory register R2. | |
| Retrieve Value From Memory Register | Retrieves the contents of the specified memory register. Click , then select the memory register from the popup menu. | 0 R2 | The value in the display area is 22. | |
| Exchange Memory Register Value and Displayed Value | Exchanges the contents of the specified memory register and the current value in the display area. Click , then select the memory register from the popup menu. | 44 R2 | The value in the display area changes from 44 to 22, the value in R2 changes from 22 to 44. |
If you use keyboard shortcuts, you can use the keyboard to specify the memory register, as shown in the following examples:
| Keyboard Entry | Description |
|---|---|
| S 2 | Stores the current contents of the display area in memory register R2. |
| R 2 | Retrieves the current contents of memory register R2 into the display area. |
| X 2 | Exchanges the current value of the display area with the contents of memory register R2. |
3.4. To Perform Financial Calculations
To change to Financial mode, choose .
When you change to Financial mode, the following buttons are displayed above the Basic and Advanced mode buttons:
To perform financial calculations, use the buttons described in Table 5.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Compounding Term | Calculates the number of compounding periods necessary to increase an investment from a present value to a future value, at a fixed interest rate per compounding period. | You have just deposited $8000 in an account that pays an annual interest rate of 9%, compounded monthly. Given the annual interest rate, you determine that the simple monthly interest rate is 0.09 / 12 = 0.0075. To calculate the time period necessary to double your investment, click , and put the following values into the text entries:
Click | 92.77 The investment doubles in value in 92.77 months. | |
| Double-Declining Depreciation | Calculates the depreciation allowance on an asset for a specified period of time, using the double-declining balance method. | You have just purchased an office machine for $8000. The useful life of this machine is six years. The salvage value after six years is $900. To calculate the depreciation expense for the fourth year, using the double-declining balance method, click and put the following values into the text entries:
Click | 790.12 The depreciation expense for the fourth year is $790.12. | |
| Future Value | Calculates the future value of an investment based on a series of equal payments at a specific periodic interest rate, over the number of payment periods in the term. | You plan to deposit $4000 in a bank account on the last day of each year for the next 20 years. The account pays 8% interest, compounded annually. Interest is paid on the last day of each year. To calculate the value of your account in 20 years, press and put the following values into the text entries:
Click | 183047.86 At the end of 20 years, the value of the account is $183,047.86. | |
| Gross Profit Margin | Calculates the resale price of a product, based on the product cost and the wanted gross profit margin. | You sell T-Shirts online. Each T-Shirt cost you $12 in material and labor. You want to sell the T-Shirts with a Gross Profit Margin of 0.40 - for every five dollars you earn, you want two to be profit. To calculate the price you would have to sell your T-Shirts for, press and put the following values into the text entries:
Click | 20 You will have to sell your T-Shirts for $20 | |
| Periodic Payment | Calculates the amount of the periodic payment of a loan, where payments are made at the end of each payment period. | You are considering a $120,000 mortgage for 30 years at an annual interest rate of 11.0%. Given the annual interest rate, you determine that the simple monthly interest rate is 0.11 / 12 = 0.00917. The term is 30 * 12 = 360 months. To calculate the monthly repayment for this mortgage, press and put the following values into the text entries:
Click | 1143.15 The monthly repayment is $1143.15. | |
| Present Value | Calculates the present value of an investment based on a series of equal payments, discounted at a periodic interest rate, over the number of payment periods in the term. | You have just won a million dollars. The prize is awarded in 20 annual payments of $50,000 each. Annual payments are received at the end of each year. If you were to accept the annual payments of $50,000, you would invest the money at a rate of 9%, compounded annually. However, you are given the option of receiving a single lump-sum payment of $400,000 instead of the million dollars annuity. To calculate which option is worth more in today's dollars, press and put the following values into the text entries:
Click | 456427.28 The $1,000,000 paid over 20 years is worth $456,427.28 in present dollars. | |
| Periodic Interest Rate | Calculates the periodic interest necessary to increase an investment of a present value to a future value, over a number of compounding periods. | You have invested $20,000 in a bond. The bond matures in five years, and has a maturity value of $30,000. Interest is compounded monthly. The term is 5 * 12 = 60 months. To calculate the periodic interest rate for this investment, press and put the following values into the text entries:
Click | .00678 The monthly interest rate is 0.678%. The annual interest rate is 0.678% * 12 = 8.14%. | |
| Straight-Line Depreciation | Calculates the straight-line depreciation of an asset for one period. The depreciable cost is cost - salvage. The straight-line method of depreciation divides the depreciable cost evenly over the useful life of an asset. The useful life is the number of periods, typically years, over which an asset is depreciated. | You have just purchased an office machine for $8000. The useful life of this machine is six years. The salvage value after six years is $900. To calculate the yearly depreciation expense, using the straight-line method, prss , and put the following values into the first three memory registers:
Click | 1183.33 The yearly depreciation expense is $1183.33. | |
| Sum-Of-The-Years'-Digits Depreciation | Calculates the depreciation allowance on an asset for a specified period of time, using the Sum-Of-The-Years'-Digits method. This method of depreciation accelerates the rate of depreciation, so that more depreciation expense occurs in earlier periods than in later ones. The depreciable cost is cost - salvage. The useful life is the number of periods, typically years, over which an asset is depreciated. | You have just purchased an office machine for $8000. The useful life of this machine is six years. The salvage value after six years is $900. To calculate the depreciation expense for the fourth year, using the sum-of-the-years'-digits method, press , and put the following values into the text entries:
Click | 1014.29 The depreciation expense for the fourth year is $1014.29. | |
| Payment Period | Calculates the number of payment periods that are necessary during the term of an ordinary annuity, to accumulate a future value, at a certain periodic interest rate. | You plan to deposit $1800 in a bank account on the last day of each year. The account pays 11% interest, compounded annually. Interest is paid on the last day of each year. To calculate the time period necessary to accumulate $120,000, press , and put the following values into the text entries:
Click | 20.32 $120,000 accumulates in the account in 20.32 years. |
3.5. To Perform Scientific Calculations
To change to Scientific mode, choose .
When you change to Scientific mode, the following buttons are displayed above the Basic and Advanced mode buttons:
- 3.5.1. To Set the Accuracy
- 3.5.2. To Set the Display Type
- 3.5.3. To Set the Trigonometric Type
- 3.5.4. To Set the Trigonometric Options
- 3.5.5. To Calculate Trigonometric Values
- 3.5.6. To Calculate Logarithms
- 3.5.7. To Enter Exponential Numbers
- 3.5.8. To Use Constant Values
- 3.5.9. To Use Functions
- 3.5.10. To Perform Miscellaneous Scientific Calculations
3.5.1. To Set the Accuracy
To set the accuracy of the display area and of the memory registers, click , then select from the popup menu the accuracy level that you require. The current accuracy level is indicated by a preceding black circle in the popup menu. Up to 99 significant places can be displayed. The default accuracy is 9 significant places.
To set the accuracy level above 9, select Other (9) ..., then choose the accuracy level you require in the Set Precision popup.
By default, trailing zeroes are not shown. To display trailing zeroes, click then select Show Trailing Zeroes from the popup menu, or choose . A preceding check mark in the popup menu or menu indicates that the Show Trailing Zeroes option has been selected. To hide trailing zeroes, choose again.
The examples in the following table show how the accuracy setting affects x in the display area, when you use decimal base, with the option selected, for the 1 / 8 = x calculation:
| Accuracy | Result |
|---|---|
| 1 significant place | 1.2 |
| 2 significant places | 1.25 |
| 3 significant places | 1.250 |
3.5.2. To Set the Display Type
To set the display type, select one of the buttons described in Table 6.
| Function | Button | Description |
|---|---|---|
| Engineering Display Type | Sets the display type to engineering format. Results are displayed in scientific notation. The exponent is always a multiple of three. | |
| Fixed-Point Display Type | Sets the display type to fixed-point format. Results are not displayed in scientific notation. Fixed-point is the default display type. If you change from scientific mode to either basic mode or financial mode, gcalctool automatically sets the display type to fixed-point format. | |
| Scientific Display Type | Sets the display type to scientific format. Results are displayed in scientific notation, with a fixed number of numeric digits. |
3.5.3. To Set the Trigonometric Type
To set the trigonometric type, select one of the buttons described in Table 7.
3.5.4. To Set the Trigonometric Options
To set the trigonometric options, use the options described in Table 8.
| Function | Button | Description |
|---|---|---|
| Hyperbolic Option Indicator | Selects the hyperbolic option for use with the trigonometric functions. | |
| Inverse Option Indicator | Selects the inverse option for use with the trigonometric functions. |
By default, the options described in Table 8 are not selected. Click to deselect these options.
3.5.5. To Calculate Trigonometric Values
To calculate trigonometric values, use the buttons described in Table 9.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Cosine cos | , Hyp option not selected, Inv option not selected | Calculates the cosine of the current value in the display area. | 60 | 0.5 |
| Arc Cosine acos | , Hyp option not selected, Inv option selected | Calculates the arc cosine of the current value in the display area. | 0.5 Inv | 60 |
| Hyperbolic Cosine cosh | , Hyp option selected, Inv option not selected | Calculates the hyperbolic cosine of the current value in the display area. | 0.4 Hyp | 1.081072372 |
| Arc Hyperbolic Cosine acosh | , Hyp option selected, Inv option selected | Calculates the arc hyperbolic cosine of the current value in the display area. | 1.6 Hyp Inv | 1.046967915 |
| Sine sin | , Hyp option not selected, Inv option not selected | Calculates the sine of the current value in the display area. | 90 | 1 |
| Arc Sine asin | , Hyp option not selected, Inv option selected | Calculates the arc sine of the current value in the display area. | 1 Inv | 90 |
| Hyperbolic Sine sinh | , Hyp option selected, Inv option not selected | Calculates the hyperbolic sine of the current value in the display area. | 0.4 Hyp | 0.410752326 |
| Arc Hyperbolic Sine asinh | , Hyp option selected, Inv option selected | Calculates the arc hyperbolic sine of the current value in the display area. | 1.6 Hyp Inv | 1.248983328 |
| Tangent tan | , Hyp option not selected, Inv option not selected | Calculates the tangent of the current value in the display area. | 45 | 1 |
| Arc Tangent atan | , Hyp option not selected, Inv option selected | Calculates the arc tangent of the current value in the display area. | 1 Inv | 45 |
| Hyperbolic Tangent tanh | , Hyp option selected, Inv option not selected | Calculates the hyperbolic tangent of the current value in the display area. | 0.6 Hyp | 0.537049567 |
| Arc Hyperbolic Tangent atanh | , Hyp option selected, Inv option selected | Calculates the arc hyperbolic tangent of the current value in the display area. | 0.6 Hyp Inv | 0.693147181 |
3.5.6. To Calculate Logarithms
To calculate logarithms, use the buttons described in Table 10.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Common Logarithm Base 10 | Log10 | Calculates the common logarithm (base 10) of the current value in the display area. | 10 Log10 | 1 |
| Natural Logarithm | Calculates the natural logarithm of the current value in the display area. | 10 | 2.30 | |
| Common Logarithm Base 2 | Log2 | Calculates the common logarithm (base 2) of the current value in the display area. | 10 Log2 | 3.32 |
Common antilogarithm and natural antilogarithm are not supported in this version of gcalctool.
3.5.7. To Enter Exponential Numbers
To enter exponential numbers, use the button.
The button enables you to enter numbers in scientific notation, that is, mantissa * baseexponent:
- mantissa
Current non-zero value in the display area. If the current value in the display area is zero, the mantissa is 1.0.
- base
2, 8, 10, or 16 for binary, octal, decimal, and hexadecimal numeric base respectively.
- exponent
Next number that you enter.
When you click , the calculator displays . + to represent base to the power of the next number that you enter.
To change the sign of the number, use the button before the button. To change the sign of the exponent (the power to which the number is raised) use after the button.
To enter a decimal number in exponential format, use the guidelines in the following table:
| Number | Enter | Number Displayed |
|---|---|---|
| 1200000000 | 12 | 1200000000 |
| -1200000000 | 12 | -1200000000 |
| 0.00000012 | 12 | 1.2e-7 |
| -0.00000012 | 12 | -1.2e-7 |
3.5.8. To Use Constant Values
Click to display the list of defined constant values. All constant values are specified in decimal numeric base, even if the current numeric base is not decimal.
Select a constant from the menu to enter its value in the display area. If you use the keyboard shortcut #, you can use the keyboard to specify the constant, as shown in the following example:
| Keyboard Entry | Constant |
|---|---|
| # 3 | C3 |
The gcalctool application provides ten default constant values, as described in the following table:
| Number | Value | Description |
|---|---|---|
| C0 | 0.621 | Kilometer-to-mile conversion factor Multiply the current value in the display area by this constant, to convert from kilometers per hour to miles per hour. For example, 8 * C0 = 5. Divide the current value in the display area by this constant, to convert from miles per hour to kilometers per hour. For example, 5 / C0 = 8. |
| C1 | 1.414213562 | Square root of 2 |
| C2 | 2.718281828 | e |
| C3 | 3.141592653 | pi |
| C4 | 0.3937007 | Centimeter-to-inch conversion factor Multiply the current value in the display area by this constant, to convert from centimeters to inches. For example, 30 * C4 = 12. Divide the current value in the display area by this constant, to convert from inches to centimeters. For example, 12 / C4 = 30. |
| C5 | 57.295779513 | Degrees in a radian |
| C6 | 1048576 | 2 ^ 20 |
| C7 | 0.0353 | Gram-to-ounce conversion factor Multiply the current value in the display area by this constant, to convert from grams to ounces. For example, 500 * C7 = 18. Divide the current value in the display area by this constant, to convert from ounces to grams. For example, 18 / C7 = 500. |
| C8 | 0.948 | Kilojoule-to-British-thermal-unit conversion factor Multiply the current value in the display area by this constant, to convert from kilojoules to British thermal units. For example, 10 * C8 = 9.48. Divide the current value in the display area by this constant, to convert from British thermal units to kilojoules. For example, 9.48 / C8 = 10. |
| C9 | 0.061 | Cubic-centimeter-to-cubic-inch conversion factor Multiply the current value in the display area by this constant, to convert from cubic centimeters to cubic inches. For example, 100 * C9 = 6.10. Divide the current value in the display area by this constant, to convert from cubic inches to cubic centimeters. For example, 6.10 / C9 = 100. |
You can overwrite the default constants to store your own constants.
To store a new constant or edit an existing constant, perform the following steps:
- Click , then select Edit Constants from the popup menu.
- In the Edit Constants dialog, select the constant that you want to overwrite or edit.
- Click on the Value field, then enter the new value.
- Click on the Description field, then enter the new description.
- Click to save your changes and close the Edit Constants dialog.
3.5.9. To Use Functions
To show the available functions, click . A popup menu displays the list of defined functions. Select a function from the menu to run that function.
If you use the keyboard shortcut F, you can use the keyboard to specify the function, as shown in the following example:
| Keyboard Entry | Function |
|---|---|
| F 3 | F3 |
The gcalctool application does not provide any default functions. You can store up to ten functions.
To store a new function or edit an existing function, perform the following steps:
- Click , then select Edit Functions from the popup menu.
- In the Edit Functions dialog, select a blank entry, or the function that you want to overwrite.
- Click on the Value field, then enter the new equation to solve. You can use "ans" for the result of the previous equation and "R5" for register 5 etc. For example, enter (-R1+sqrt(R1^2-4*R0*R2))/(2*R0) to calculate a root of the quadratic equation R0*x^2 + R1*x + R2 = 0.
- Click on the Description field, then enter the new description. For example, Quadratic Solver.
- Click to save your changes and close the Edit Functions dialog.
3.5.10. To Perform Miscellaneous Scientific Calculations
To perform miscellaneous scientific calculations, use the buttons described in Table 11.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| e to the x power | ex | Calculates the value of e raised to the power of the current value in the display area. | 2 ex | 7.39 |
| 10 to the x power | 10x | Calculates the value of 10 raised to the power of the current value in the display area. | 2 10x | 100 |
| 2 to the x power | 2x | Calculates the value of 2 raised to the power of the current value in the display area. | 2 2x | 4 |
| x to the y power | xy | Raises the current value in the display area to the power of the next value that you enter. | 2 xy | 16 |
| x to the reciprocal y power | x1/y | Raises the current value in the display area to the reciprocal power of the next value that you enter. | 2 x1/y | 16 |
| x Factorial | Calculates the factorial of the current value in the display area. x factorial is x*(x-1)*(x-2)...*1. This function applies only to positive integers. | 4 | 24 | |
| Modulus Division | Divides the current integer value in the display area by the next integer number that you enter, displaying the remainder. | 15 | 3 | |
| Random Number Generator | Generates a random number in the range 0.0 to 1.0 then displays the random number in the display area. | 0.14 |
3.6. To Perform Programming Calculations
To change to Programming mode, choose .
When you change to Programming mode, the following widget is displayed above the Base and Advanced mode buttons:
3.6.1. To Set the Numeric Base
To set the numeric base, select one of the buttons described in Table 12.
| Function | Button | Description |
|---|---|---|
| Binary Base | Sets the numeric base to binary, that is, base 2. | |
| Octal Base | Sets the numeric base to octal, that is, base 8. | |
| Decimal Base | Sets the numeric base to decimal, that is, base 10. Decimal is the default numeric base. If you change from Programming mode to another mode, gcalctool automatically sets the numeric base to decimal. | |
| Hexadecimal Base | Sets the numeric base to hexadecimal, that is, base 16. |
3.6.2. To Set the Word Length
The word length can be altered, to make the bitwise functions behave differently. To set the word length, select one of the buttons described in Table 13.
3.6.3. To Perform Bit Manipulations on Integers
If the calculator display shows an integer value, then each of the bits in that integer value is displayed as a collection of 0s and 1s in the Bit Editor. By clicking on any of these individual bits, their value can be toggled, causing the displayed integer value to be adjusted accordingly.
3.6.4. To Perform Bitwise Calculations
To perform bitwise calculations, use the buttons described in Table 14.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Bitwise OR | Performs a bitwise OR operation on the current value in the display area and the next number that you enter. | 10001000 00010001 | 10011001 | |
| Bitwise AND | Performs a bitwise AND operation on the current value in the display area and the next number that you enter. | 10101010 00110011 | 100010 | |
| Bitwise NOT | Performs a bitwise NOT operation on the current value in the display area, using the word size configured in Section 3.6.2 ― To Set the Word Length. | 1357ACE | FECA8531 | |
| Bitwise XOR | Performs a bitwise XOR operation on the current value in the display area and the next number that you enter. | 1100 1010 | 110 | |
| Bitwise XNOR | Performs a bitwise XNOR operation on the current value in the display area and the next number that you enter. | 1100 1010 | 1001 |
3.6.5. To Manipulate Binary Numbers
To manipulate binary numbers, use the buttons described in Table 15.
| Function | Button | Description | Example | Result |
|---|---|---|---|---|
| Left Shift n | Shifts the current value in the display area, the specified number of places to the left. Click , then select the number of shift places from the popup menu. The number can be shifted up to 15 places left. | 111 1 place | 1110 | |
| Right Shift n | Shifts the current value in the display area, the specified number of places to the right. Click , then select the number of shift places from the popup menu. The number can be shifted up to 15 places right. | 1011 1 place | 101 | |
| Truncating a number | Truncates the current value in the display area to the word size configured in Section 3.6.2 ― To Set the Word Length. | FFFFFFFFFF | FFFFFFFF | |
| Get the 1's complement | Calculates the 1's complement for the current value in the display area, using the word size configured in Section 3.6.2 ― To Set the Word Length. | D723 | FFFF28DC | |
| Get the 2's complement | Calculates the 2's complement for the current value in the display area, using the word size configured in Section 3.6.2 ― To Set the Word Length. | D723 | FFFF28DD |
If you use keyboard shortcuts, you can use the keyboard to specify the number of places to shift, as shown in the following examples:
| Keyboard Entry | Description |
|---|---|
| < 4 | Shifts the current binary value in the display area 4 places to the left. |
| > 4 | Shifts the current binary value in the display area 4 places to the right. |
3.6.6. To Perform Miscellaneous Programming Calculations
To perform miscellaneous programming calculations, use the buttons described in Table 16.
3.7. To Undo and Redo
To undo your previous action, choose . You can undo up to 15 past actions.
If you want to redo an action you have just undone, choose . You can redo up to 15 undone actions.
3.8. To Quit
To quit gcalctool, choose .
When you quit gcalctool, the current values of the following settings are stored and automatically applied the next time you start gcalctool:
- Mode: Basic, Advanced, Financial, or Scientific
- Accuracy
- Memory Registers window displayed or not displayed, plus the contents of each memory register
- Numeric base
- Display type
- Trigonometric type
- Show Trailing Zeroes
- Show Thousands Separator