| description | title | ms.date | f1_keywords | helpviewer_keywords | |||
|---|---|---|---|---|---|---|---|
Learn more about: isnormal | isnormal | 01/31/2019 |
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Determines whether a floating-point value is a normal value.
intisnormal( /* floating-point */x ); /* C-only macro */template<classFloatingType>inlineboolisnormal( FloatingTypex ) throw(); /* C++-only function template */x
The floating-point value to test.
isnormal returns a nonzero value (true in C++ code) if the argument x isn't zero, subnormal, infinite, or a NaN. Otherwise, isnormal returns 0 (false in C++ code).
isnormal is a macro when compiled as C, and an inline function template when compiled as C++.
| Function | Required header (C) | Required header (C++) |
|---|---|---|
isnormal | <math.h> | <math.h> or <cmath> |
For more compatibility information, see Compatibility.
Math and floating-point supportisfinite, _finite, _finitefisinfisnan, _isnan, _isnanf_fpclass, _fpclassf
