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ceil

#include <math.h>float ceilf(float num);double ceil(double num); long double ceill(long double num); 

ceilf( ) and ceill( ) were added by C99.

The ceil( ) family of functions returns the smallest integer (represented as a floating-point value) not less than num. For example, given 1.02, ceil( ) would return 2.0. Given –1.02, ceil( ) would return –1.

Related functions are floor( ) and fmod( ).