Batch set /p
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Set variable in batch file for loop.
/* steve jansen */
Today we’ll cover variables, which are going to be necessary in any non-trivial batch programs. The syntax for variables can be a bit odd, so it will help to be able to understand a variable and how it’s being used.
Variable Declaration
DOS does not require declaration of variables.
The value of undeclared/uninitialized variables is an empty string, or .
Comment in batch file
Most people like this, as it reduces the amount of code to write. Personally, I’d like the option to require a variable is declared before it’s used, as this catches silly bugs like typos in variable names.
Variable Assignment
The command assigns a value to a variable.
NOTE: Do not use whitespace between the name and value; will not work but will work.
The switch supports arthimetic operations during assigments.
This is a useful tool if you need to validated that user input is a numerical value.
A common convention is to use lowercase names for your script’s variables. System-wide variables, known as environmental variables, use uppercase names.
These environmental des
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