TRUNC(3) BSD Programmer's Manual TRUNC(3)
trunc, truncf - nearest integral value with magnitude less than or equal to |x|
#include <math.h> double trunc(double x); float truncf(float x);
The trunc() and truncf() functions return the nearest integral value with magnitude less than or equal to |x. They are equivalent to rint() and rintf() respectively, in the FP_RZ rounding mode.
ceil(3), floor(3), fpsetround(3), math(3), nextafter(3), rint(3), round(3)
The trunc() and truncf() functions conform to ISO/IEC 9899:1999 ("ISO C99"). MirOS BSD #10-current February 9, 2014 1
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