March 31, 2006 TRUNC 3

### NAME

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

### LIBRARY

Math Library (libm, -lm)

### SYNOPSIS

```double` trunc(```double x`)
```float` truncf(```float x`)

### DESCRIPTION

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.

### SEE ALSO

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

### STANDARDS

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