Basic Calculator in CMD

• 
• Start notepad on your system
• Paste the following code:

• @echo off

  cd c:\windows\system32

  title CALCULATOR

  echo Enter a to add, s to substract, d to divide and m to multiply

  set /p ch=:

  If %ch% == a goto a

  If %ch% == s goto s

  If %ch% == d goto d

  If %ch% == m goto m

  :a

  set /p o=First Number: 

  set /p t=Second Number: 

  set /a a=%o% 

  set /a b=%t% 

  set /a ans = %a%+%b% 

  echo %ans% 

  goto end

  :s

  set /p o=First Number: 

  set /a a=%o% 

  set /p t=Second Number: 

  set /a b=%t%

  set /a ans = %a%-%b% 

  echo %ans% 

  goto end

  :d 

  set /p o=First Number: 

  set /a a=%o% 

  set /p t=Second Number: 

  set /a b=%t%

  set /a ans = %a%/%b% 

  echo %ans% 

  goto end

  :m

  set /p o=First Number: 

  set /a a=%o% 

  set /p t=Second Number: 

  set /a b=%t%

  set /a ans = %a%*%b% 

  echo %ans% 

  goto end

  :end

  pause

• Save the notepad file as Calc.cmd on desktop
• Just double-click the file to start the Calculator