| ISNORMAL(3M) | Mathematical Library Functions | ISNORMAL(3M) |
isnormal - test for a normal value
c99 [ flag... ] file... -lm [ library... ] #include <math.h> int isnormal(real-floating x);
The isnormal() macro determines whether its argument value is normal (neither zero, subnormal, infinite, nor NaN). First, an argument represented in a format wider than its semantic type is converted to its semantic type. Then determination is based on the type of the argument.
The isnormal() macro returns a non-zero value if and only if its argument has a normal value.
No errors are defined.
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Standard |
| MT-Level | MT-Safe |
math.h(3HEAD), fpclassify(3M), isfinite(3M), isinf(3M), isnan(3M), signbit(3M), attributes(7), standards(7)
| July 12, 2006 | SunOS 5.11 |