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The floor of a non-negative number a: the greatest integer that is smaller than or equal to a. For example,⎣5⎦ = 5, and⎣5.9⎦ = 5.
NIST SP 800-106
The floor of x; the largest integer ≤ x. For example,⎿5⏌ = 5 and⎿6.9⏌ = 6.
NIST SP 800-135 Rev. 1
The floor function of x; for a given real positive x,ëxû = x-g, whereëxûis a non-negative integer, and 0 £ g< 1.
NIST SP 800-22 Rev. 1a under ⎿x⏌
The floor of x; the greatest integer that does not exceed x. For example, \(\lfloor\)2.1\(\rfloor\) = 2, and \(\lfloor\)4\(\rfloor\) = 4.
NIST SP 800-56B Rev. 2