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|man pages section 3: Extended Library Functions Oracle Solaris 10 8/11 Information Library|
- round to truncated integer value
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double trunc(double x);
float truncf(float x);
long double truncl(long double x);
These functions round their argument to the integer value, in floating format, nearest to but no larger in magnitude than the argument.
Upon successful completion, these functions return the truncated integer value.
If x is NaN, a NaN is returned.
If x is ±0 or ±Inf, x is returned.
No errors are defined.
See attributes(5) for descriptions of the following attributes: