Information about Calculator (windows)

Calculator
Calculator in Windows Vista in Standard mode
Developer:	Microsoft
Latest release:	6.0.6000.16386 / November 8 2006
OS:	Microsoft Windows
Genre:	Calculator
License:	MS-EULA
Website:	Windows Vista Help: Calculator: frequently asked questions

Microsoft Calculator is a calculation application included with all Microsoft Windows operating systems.

Overview

The Calculator application has a simplified interface, small size, and can perform all of the functions of most four-function or scientific calculators. By default, the application is in the "Standard" mode, and functions as a four-function calculator. More advanced functions are available in "Scientific" mode, including logarithms, numerical base conversions, some logical operators, radian, degree and gradians support as well as simple single-variable statistical functions. It does not provide support for user-defined functions, complex numbers, storage variables for intermediate results (other than the classic accumulator memory of pocket calculators), automated polar-cartesian coordinates conversion, or support two-variables statistics, making it impractical to use with many engineering, physics or high school mathematics tasks. Calculator is not able to do "constant calculations". When a user wants to apply the same constant and operation many times, the second and following calculations can be done without retyping the operation and constant. So one can type: 2*7=[14] 3=[21] 4=[28] etc. Calculator ignores the number typed before the equal sign.

Some versions of Calculator have a way to automate long calculations. Writing a text file in Notepad or another text editor containing a number on the first row, then operators followed by numbers on the next row and pasting this content to calculator's textbox will result in it performing the described calculations. This may not work correctly with all versions of Calculator, and depends on precise text formatting. Also, this sort of "automation" does not work with commands other that the standard arithmetic operators (+, - , /, *), making it only suitable for computing large cumulative sums starting from a file or spreadsheet data.

Calculator has been included with every release of Microsoft Windows, but the user interface and the core feature set, has largely remained unchanged in form and function since Windows 95. The Calculator in Windows 2000 and later Windows NT-based versions uses an arbitrary-precision arithmetic library, replacing the standard IEEE floating point library.^[1] It offers infinite precision for basic operations (addition, subtraction, multiplication, division) and 32 digits of precision for advanced operations (square root, transcendental operators).

Many specialized keyboards have a "calculator" key, which launches Calculator by default.

Bugs

The version of Calculator shipped with Windows 3.0 and Windows 3.1 suffered from a bug causing it to display incorrect results for certain classes of calculations. The most typical example was the 1-1.1 operation, which would lead to a long number sequence approximating the expected result, -0.1, such as -0.095645564564564.... One of the most joked about calculation is 3.11-3.1, results in 0.00. This leads to the joke "Q: What is the difference between 3.11 and 3.1? A: Nothing!" (In this case, "3.11" and "3.1" imply the version numbers of Windows.) This may, however, be attributed to floating point calculations with insufficient accuracy as they are prone to yield wrong results in calculations with numbers that cannot be accurately represented in binary. The modern versions, described above, eliminate this bug.

Calculator since Windows 3.0 has had the 'sqrt' button available only in the standard mode. Switching over to scientific mode will make this button disappear. There is no fix, but Microsoft suggests raising numbers to the half power (e.g. 144 ^ .5 ),^[2] even though selecting the 'inv' checkbox and clicking 'x^2' button will provide the square root function.

If you type “calc /.setup“ into the RUN box on windows, calculator will be launched, but displaying “0,e+0“ instead of “0“ and when you click a number-button 1-9, it will only make a characteristic sound instead of typing a number.

All Calculator versions until the one for Windows XP saves its configuration (whether to use scientific or standard mode) to the legacy win.ini - a file that is not writable for users. So non-admin users will always start in standard mode. Calculator Plus fixes this bug by saving the information where it belongs - into the user portion of the registry.

Optional Calculator replacements

Microsoft has released two other calculator applications to the Microsoft Download Center, both of which offer features not found in the Calculator included with Windows.

Microsoft Calculator Plus - In addition to the 'Standard' and 'Scientific' modes offered by Microsoft Calculator, Calculator Plus also offers a 'Conversion' mode. 'Conversion' mode supports unit conversion and currency conversion. Calculator Plus supports direct update of exchange rates for European currencies from European Central Bank website. Calculator Plus also provides an alternate interface.

Power Calculator - Released as a Windows XP PowerToy. Power Calculator supports graphing. Although the program allows user to adjust the precision of calculations, there are flaws in the implementation. For example, the program produces an erroneous graph for the function . It also returns incorrect values for the sine function for a large number of radians. For example, it gives .

See also

• List of Microsoft Windows components

References

External links

• Microsoft Calculator Plus
• Power Calculator

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