C Tutorial/math.h/ceil
ceil
Item Value Header file math.h Declaration float ceilf(float num);double ceil(double num);long double ceill(long double num); Return returns the smallest integer not less than num.
- Given 1.02, ceil() would return 2.0.
- Given -1.02, ceil() would return -1.
<source lang="cpp">#include <math.h>
#include <stdio.h> int main(void) { printf("%f", ceil(9.9)); }</source>