Comparing $number with int($number) for equalness might fail due to rounding issues.

Not true in the narrow context of the equality test. If you have already rounded $number to a suitable precision then the equality test will always be correct. When they can be represented at all, integers are stored and manipulated precisely.

Perl's payment curve coincides with its learning curve.

In reply to Re^2: How to determine whether a number has a decimal component? by GrandFather
in thread How to determine whether a number has a decimal component? by Xenofur

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