# truncf(3) [freebsd man page]

```TRUNC(3)						   BSD Library Functions Manual 						  TRUNC(3)

NAME
trunc, truncf, truncl -- nearest integral value with magnitude less than or equal to |x|

LIBRARY
Math Library (libm, -lm)

SYNOPSIS
#include <math.h>

double
trunc(double x);

float
truncf(float x);

long double
truncl(long double x);

DESCRIPTION
The trunc(), truncf(), and truncl() functions return the nearest integral value with magnitude less than or equal to |x|.	They are equiva-
lent to rint(), rintf(), and rintl(), respectively, in the FE_TOWARDZERO rounding mode.

ceil(3), fesetround(3), floor(3), math(3), nextafter(3), rint(3), round(3)

STANDARDS
The trunc(), truncf(), and truncl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
These routines first appeared in FreeBSD 5.3.

BSD								  April 16, 2005							       BSD```

## Check Out this Related Man Page

```floor(3)						     Library Functions Manual							  floor(3)

NAME
floor,  ceil,  modf,  nint,   rint, trunc - Round floating-point numbers to floating-point integers, return the nearest integral value, and
truncate a floating-point number

LIBRARY
Math Library (libm.a)

SYNOPSIS
#include <math.h>

double floor   (double x);
float  floorf  (float  x);
long double floorl   (long double x);
double ceil    (double x);
float  ceilf   (float  x);
long double ceill    (long double x);
double modf    (double x, double *n);
float  modff   (float  x, float	*n);
long double modfl    (long double x, long double *n);
double nint    (double x);
float  nintf   (float  x);
long double nintl    (long double x);
double rint    (double x);
float  rintf   (float  x);
long double rintl    (long double x);
double trunc   (double x);
float  truncf  (float  x);
long double truncl   (long double x);

STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:

floor():  XPG4

ceil():	XPG4

modf():	XPG4

rint():	XPG4-UNIX

DESCRIPTION
The floor(), floorf(), and floorl() functions return the largest floating-point integer value less than or equal to  x.

The ceil(), ceilf(), and ceill() functions return the smallest floating-point integer value greater than or equal to  x.

The modf(), modff(), and modfl() functions split a floating-point number x into a fractional part f and an integer part i such that  |f|  <
1.0 and (f + i) = x.  Both f and i have the same sign as x.  The modf(), modff(), and modfl() functions return f and store i into the loca-
tion pointed to by n.

The nint(), nintf(), and nintl() functions return the nearest integral value to x, except halfway cases are rounded to the  integral  value
larger in magnitude. This corresponds to the FORTRAN generic intrinsic function nint().

The  rint(), rintf(),  and rintl() functions round x to an integral value according to the current IEEE rounding direction specified by the
user.

The trunc(), truncf(), and truncl() functions truncate x to an integral value.  delim off

floor(3)```
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