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Remove Decimals

This lesson is part of How To · All levels

Summary

Removing decimals means turning a fractional number into an integer, for example 12.75 to 12. JavaScript provides Math.trunc to cut the decimal point, Math.floor to round down, and Math.round to round to nearby. The choice of method depends on whether you want to cut, round, or keep the negative value.

Key points

Cut the decimal without dipping
Math.floor() round down, as opposed to truncating to negative numbers
Math.round() round to the nearest integer
Return the string and do the drill, not just cut it.

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