isinf
From cppreference.com
| Defined in header
<math.h>
|
||
| #define isinf(arg) /* implementation defined */
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(since C99) | |
Determines if the given floating point number arg is positive or negative infinity. The macro returns an integral value.
Contents |
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
Nonzero integral value if arg is infinite, 0 otherwise.
[edit] Example
Run this code
#include <stdio.h> #include <math.h> #include <float.h> int main(void) { printf("isinf(NAN) = %d\n", isinf(NAN)); printf("isinf(INFINITY) = %d\n", isinf(INFINITY)); printf("isinf(0.0) = %d\n", isinf(0.0)); printf("isinf(DBL_MIN/2.0) = %d\n", isinf(DBL_MIN/2.0)); printf("isinf(1.0) = %d\n", isinf(1.0)); return 0; }
Possible output:
isinf(NAN) = 0 isinf(INFINITY) = 1 isinf(0.0) = 0 isinf(DBL_MIN/2.0) = 0 isinf(1.0) = 0
[edit] See also
| (C99)
|
classifies the given floating-point value (function) |
| (C99)
|
checks if the given number has finite value (function) |
| (C99)
|
checks if the given number is NaN (function) |
| (C99)
|
checks if the given number is normal (function) |
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C++ documentation for isinf
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