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.

1. Given 1.02, ceil() would return 2.0.
2. 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>