Whether it's faster or not you'll have to determine yourself, but it's another way: 

use POSIX qw[ fmod ];;
print fmod( $_, 100 ) for 12300, 12301, 12399;;
0
1
99

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Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re: modulus and floating point numbers by BrowserUk
in thread modulus and floating point numbers by dextius

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