trunc, truncf, truncl - round to truncated integer value

Syntax	#include <math.h> C11 double trunc(double x); float truncf(float x); long double truncl(long double x); (End)
Description	These functions round their argument to the integer value, in floating format, nearest to but no larger in magnitude than the argum.
Return val.	Integer part of x with the sign of x.
See also	frexp(), ldexp(), modf(),  math.h.