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ISINTEGE.KEY
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1993-11-07
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* isinteger internal
isinteger(x) gives 1 if x is an integer, or 0 otherwise.
You can assume x is integer by isinteger(x) := 1.
See also: iscomplex, iseven, isfree, isinteger, islarger, isless, islist,
isodd, isreal, isratio, issame, isnumber.
e.g. isinteger(2) gives 1, isinteger(3.2) gives 0.