macro | isinf(x) |
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function | bool isinf (float x); bool isinf (double x); bool isinf (long double x); |
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int
value. The type of x shall be float
, double
or long double
.bool
value.true
) if x is an infinity; and zero (false
) otherwise.
|
|
isinf(0.0) : 0 isinf(1.0/0.0) : 1 isinf(-1.0/0.0) : 1 isinf(sqrt(-1.0): 0 |