Mathematical Library Functions                           ceil(3M)



NAME
     ceil, ceilf, ceill - ceiling value function

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     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.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:














SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                           ceil(3M)



     
           ATRIBUTE TYPE               ATRIBUTE 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          Last change: 12 Jul 2006                    2