NAME
ceil,
ceilf,
ceill,
floor,
floorf,
floorl
—
ceiling and floor
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
ceil(
double
x);
float
ceilf(
float
x);
long double
ceill(
long double
x);
double
floor(
double
x);
float
floorf(
float
x);
long double
floorl(
long
double x);
DESCRIPTION
The
ceil(),
ceilf(), and
ceill() functions return the smallest integral value greater
than or equal to
x. Conversely, the
floor(),
floorf(), and
floorl() functions return the largest integral value less
than or equal to
x.
SEE ALSO
abs(3),
fabs(3),
math(3),
nextafter(3),
rint(3)
STANDARDS
The described functions conform to
ISO/IEC 9899:1999
(“ISO C99”).