ceilf(3) [freebsd man page]

CEIL(3) 						   BSD Library Functions Manual 						   CEIL(3)

NAME

     ceil, ceilf, ceill -- smallest integral value greater than or equal to x

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <math.h>

     double
     ceil(double x);

     float
     ceilf(float x);

     long double
     ceill(long double x);

DESCRIPTION

     The ceil(), ceilf() and ceill() functions return the smallest integral value greater than or equal to x, expressed as a floating-point num-
     ber.

SEE ALSO

     abs(3), fabs(3), floor(3), ieee(3), math(3), rint(3), round(3), trunc(3)

STANDARDS

     The ceil() function conforms to ISO/IEC 9899:1990 (``ISO C90'').  The ceilf() and ceill() functions conform to ISO/IEC 9899:1999
     (``ISO C99'').

BSD
								 January 13, 2005							       BSD

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(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       feclearexcept(3M), fetestexcept(3M), floor(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							  ceil(3M)