CEIL(3M) Mathematical Library Functions CEIL(3M)
NAME
ceil, ceilf, ceill - ceiling value function
SYNOPSIS
c99 [
flag... ]
file...
-lm [
library... ]
#include <math.h>
double ceil(
double x);
float ceilf(
float x);
long double ceill(
long double x);
DESCRIPTION
These functions compute the smallest integral value not less than
x.
RETURN VALUES
Upon successful completion, the
ceil(),
ceilf(), and
ceill() functions return the smallest integral value not less than
x,
expressed as a type
double,
float, or
long double, respectively.
If
x is NaN, a NaN is returned.
If
x is +-0 or +-Inf,
x is returned.
USAGE
The integral value returned by these functions need not be
expressible as an
int or
long int. The return value should be tested
before assigning it to an integer type to avoid the undefined results
of an integer overflow.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
math.h(3HEAD),
feclearexcept(3M),
fetestexcept(3M),
floor(3M),
isnan(3M),
attributes(7),
standards(7)SunOS 5.11 July 12, 2006 CEIL(3M)
