ceil

Name

ceil, ceilf, ceill
- ceiling function: smallest integral value not less than argument

Library

libm.lib

Synopsis

#include <math.h>

double ceil (double x);

float ceilf (float x);

long double ceill (long double x);

Return values

x is integral or infinite, x itself is returned.

Detailed description

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

Examples

#include <math.h>
int main( void )
{
   double y;
   y = ceil( 2.8 );
   printf( "The ceil of 2.8 is %f\n", y );
   y = ceil( -2.8 );
   printf( "The ceil of -2.8 is %f\n", y );
   y = ceilf( 2.8 );
   printf( "The ceilf of 2.8 is %f\n", y );
   y = ceilf( -2.8 );
   printf( "The ceilf of -2.8 is %f\n", y );
   y = ceill( 2.8 );
   printf( "The ceill of 2.8 is %f\n", y );
   y = ceill( -2.8 );
   printf( "The ceill of -2.8 is %f\n", y );
}

Output

The ceil of 2.8 is 3.000000
The ceil of -2.8 is -2.000000
The ceilf of 2.8 is 3.000000
The ceilf of -2.8 is -2.000000
The ceill of 2.8 is 3.000000
The ceill of -2.8 is -2.000000

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