Most perl operators or builtins that return a boolean return for false a value that is 0 in numeric context and "" in string context. You force it to be 0 either with ?: (as shown by others) or just by giving it numeric context: 
print "It is: ", 0+your_validate_function(), "!".

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In reply to Re: printing true false values by ysth
in thread printing true false values by HarshaHegde

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