Initialize your $max_number to the minimum value you expect. For example, if you only expect positive numbers, set it to 0: 
my $max_number=0;        #initialize a variable that keeps the maximum
+ number

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Another approach is to store all values into an array, then use List::Util max . This assumes memory is not an issue.

In reply to Re: What is wrong in this code? by toolic
in thread What is wrong in this code? by Anonymous Monk

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