ROUND(3) | Library Functions Manual | ROUND(3)

# NAME

`round`, `roundf`, `roundl` —
round to nearest integral value

# LIBRARY

Math Library (libm, -lm)

# SYNOPSIS

`#include <math.h>`

double
`round`(double x);

float
`roundf`(float x);

long double
`roundl`(long double x);

# DESCRIPTION

The `round`(), `roundf`(), and `roundl`() functions return the nearest integral value to x; if x lies halfway between two integral values, then these functions return the integral value with the larger absolute value (i.e., they round away from zero).

# SEE ALSO

ceil(3), floor(3), math(3), rint(3), trunc(3)

# STANDARDS

The `round`() and `roundf`() functions conform to ISO/IEC 9899:1999 (“ISO C99”).

# HISTORY

The `round`() and `roundf`() functions appeared in NetBSD 2.0.

November 12, 2013 | NetBSD 9.5