IntegerQ

IntegerQ[expr] gives True if expr is an integer, and False otherwise.

IntegerQ[expr] returns False unless expr is manifestly an integer (i.e., has head Integer).

Simplify[expr Integers] can be used to try to determine whether an expression is mathematically equal to an integer.

See Section 2.3.5 and Section 3.1.1.

See also: EvenQ, OddQ, NumberQ, TrueQ, Element.

New in Version 1.

Further Examples