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Legacy Documentation

The Mathematical Explorer^TM (2001)

This is documentation for an obsolete product.

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 The Mathematica Book on the web:Section 2.3.5 and Section 3.1.1. See also: NumberQ, Element. Further Examples