Saturday, November 9, 2013

Batch Script: Checking empty variable


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There is a tricky way to check whether a variable is empty or not in Batch script. Just have a look at the below example:


if x%TEST% == x echo empty string


In this example, the variable TEST is added with a value x and checking whether the concatenation of x and TEST is still x or not. If its still x which means TEST didn't have any value in it. Otherwise it had a value.


Simple, isn't it?





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