How to set the arithmetic precision in 'set' batch files variables, And I know of no other way to do arithmetic in batch files. Negative numbers are relative to the length of the string (variable value); a missing The simplest fix for this is to remove the sign (if any) and then echo it ahead of the decimal string: If you want to add decimals.
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If your batch file has to print a message you definitely don't want the users to miss, use the pause statement to make the batch file sit and wait until they've read the message and acknowledged it. Here's an example:
If you want to ask a user whether to proceed after a mishap, or if you want the batch file to prompt for input filenames or other data, you can use the new extended set /p command. Set /p reads a user's response into an environment variable, where it can be tested or used as a command argument. Here's an example:
These commands ask the user to type a response, examine the leftmost letter with %answer:,1%, and take the appropriate action only if the user types a valid response. In fact, this is a good pattern to remember.