String processing in windows batch files: How to pad value with leading zeros?

Question

in a Windows cmd batch file (.bat), how do i pad a numeric value, so that a given value in the range 0..99 gets transformed to a string in the range \"00\" to \"99\". I.e. I

Answer 1

The single line

IF 1%Foo% LSS 100 SET Foo=0%Foo%

will get you what you want for numbers in the range that you specify. It does not change values in the subset 0-9 if they are already single-padded.