DOS - Arithmetic

How to use SET /A for arithmetic in DOS

DOS - Arithmetic How to use SET /A for arithmetic in DOS
Floating Point Arithmetic Working around the limitations of the command processor.	Large Integers Working around the limitations of the command processor.
Percent Basic Percent arithmetic.	SET /A Basic Integer Arithmetic.

TOP
2008-04-01

Floating Point Arithmetic - Working around the limitations of the command processor

Description:

Floating point arithmetic can be achieved by moving the fractions into the integer. I.e. A floating point equitation using values with 3 digits after the dot can be calculated as follows:

Floating Point: 12.055 + 1.001 = 13.056
Integer:        12055 + 1001 = 13056

Script:

1. 2. set /a y=12055 + 1001 echo.y = %y%

Script Output:

Script Ouput

y = 13056

TOP
2008-04-01

Large Integers - Working around the limitations of the command processor

TOP
2008-04-01

Percent - Basic Percent arithmetic

TOP
2008-04-01

SET /A - Basic Integer Arithmetic

Description:

The SET /A command can be used for basic arithmetic.
You can write SET /a y=3*x or SET /a y=3*%x%. Both are correct. The command interpreter is smart enough to recognize variables within a formula.

Script:

1. 2. 3. 4. 5. set /a x=20 set /a y=3*x set /a y+=140 set /a y/=2 echo.y = %y%

Script Output:

Script Ouput

y = 100