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trunc

Section: Mathematical Library Functions (3M)
Updated: 12 Jul 2006
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NAME

trunc, truncf, truncl - round to truncated integer value  

SYNOPSIS

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>

double trunc(double x);

float truncf(float x);

long double truncl(long double x);  

DESCRIPTION

These functions round their argument to the integer value, in floating format, nearest to but no larger in magnitude than the argument.  

RETURN VALUES

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.  

ERRORS

No errors are defined.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelMT-Safe

 

SEE ALSO

math.h(3HEAD), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
ATTRIBUTES
SEE ALSO

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