How to Make a Command Prompt Calculator

Last Updated: December 5, 2019

Making calculations using Windows calculator can get very tedious. Creating your own Command prompt calculator will make your life much easier.

Steps

1
Open notepad by going to Start> All Programs> Accessories> Notepad. Vista and 7 users can just type "notepad", without quotes, into the start menu and hit enter
2
Copy the following code:
- @echo off
- :start
- Echo Press 1 for Addition
- echo Press 2 for Subtraction
- echo Press 3 for Multiplication
- echo Press 4 for Division
- echo Press 5 to Quit
- set /p type=
- if %type%==1 goto a
- if %type%==2 goto b
- if %type%==3 goto c
- if %type%==4 goto d
- if %type%==5 goto e
- :a
- echo Addition
- echo Please choose the 2 numbers you wish to add
- set /p num1=
- set /p num2=
- echo %num1%+%num2%?
- pause
- set /a Answer=%num1%+%num2%
- echo %Answer%
- pause
- goto start
- :b
- echo Subtraction
- echo Please choose the 2 numbers you wish to subtract
- set /p num1=
- set /p num2=
- echo %num1%-%num2%?
- pause
- set /a Answer=%num1%-%num2%
- echo %Answer%
- pause
- goto start
- :c
- echo Multiplication
- echo Please choose the 2 numbers you wish to multiply
- set /p num1=
- set /p num2=
- echo %num1%*%num2%?
- pause
- set /a Answer=%num1%*%num2%
- echo %Answer%
- pause
- goto start
- :d
- echo Division
- echo Please choose the 2 numbers you wish to divide
- set /p num1=
- set /p num2=
- echo %num1%/%num2%?
- pause
- set /a Answer=%num1%/%num2%
- echo %Answer%
- pause
- goto start
- :e
- echo. Done!
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3
Go to File> Save As
- Change the "Save as type" box to "All Files"
- Type "anything.bat" into file name and click "Save"
4
Double click on the file and you will get this window:
5
Follow the simple instructions and your answer will be displayed

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Community Q&A

Question

Do I save this code on the desktop?

Community Answer

You can, yes.
Question

Why are the decimal places not shown for division?

Community Answer

The set /a command (used for doing the mathematical operations) cannot display decimal places, so it rounds it down in all cases.
Question

Step 4 is done. What do we have to do in step 5?

Community Answer

Try it out!
Question

I followed all of the instructions, but when I try to open up Command Prompt by clicking on the Notepad file, nothing happens. What should I do?

Community Answer

You open the .bat file, not the Notepad icon. It creates a new icon on the desktop (or wherever you save it to).
Question

What coding language is used to make this ?

Arrogance

Top Answerer

It doesn't have a formal name, but it is usually called the Windows/DOS batch language.