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trunc(3)                 BSD Library Functions Manual                 trunc(3)


NAME

     trunc -- truncate to integer value


SYNOPSIS

     #include <math.h>

     double
     trunc(double x);

     long double
     truncl(long double x);

     float
     truncf(float x);


DESCRIPTION

     The trunc() functions return the integral value nearest to but no larger
     in magnitude than x.


SPECIAL VALUES

     trunc(+-0) returns +-0.

     trunc(+-infinity) returns +-infinity.


VECTOR OPERATIONS

     If you need to apply the trunc() function to SIMD vectors or arrays,
     using the following functions provided by the Accelerate.framework may
     give significantly better performance:

     #include <Accelerate/Accelerate.h>

     vFloat vintf(vFloat x);
     void vvintf(float *y, const float *x, const int *n);
     void vvint(double *y, const double *x, const int *n);


SEE ALSO

     ceil(3), floor(3), round(3), math(3)


STANDARDS

     The trunc() functions conform to ISO/IEC 9899:2011.

BSD                            December 11, 2006                           BSD

Mac OS X 10.9.1 - Generated Thu Jan 9 07:27:49 CST 2014
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