TCC > Variables & Functions > Functions:
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@FLOOR[n]: Returns the largest integer that is not greater than n. @FLOOR will perform an implicit @EVAL on its argument, so you can enter an arithmetic expression.
Examples:
echo %@floor[3.14]
echo %@floor[-3.14]
echo %@floor[0]
echo %@floor[123]
See also: @CEILING.
Help URL: http://jpsoft.com/help/index.htm?f_floor.htm