floor

The floor() method rounds a number down to the nearest integer less than or equal to it. This function is useful to ensure a number never exceeds a certain integer value.

Interactive example

Syntax

function floor<
	GenericInput extends number,
>(input: GenericInput): number

Parameters

• input: The number to round down.

Return value

The largest integer less than or equal to the given number.

See also

• round - Rounds to the nearest integer
• ceil - Rounds up
• trunc - Truncates the decimal part

Sources

• MDN Web Docs - Math.floor()