Compute the smallest floating point number not less than x.
Compatibility:This function is compatible with the following targets:
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#include <math.h>
double ceil(double x);
float ceilf(float);
long double ceill(long double);Parameters:
Parameters for this function are:
ceil() returns the smallest integer not less than x.
#include <math.h>
#include <stdio.h>
int main(void)
{
double x = 100.001, y = 9.99;
printf("The ceiling of %f is %f.\n", x, ceil(x));
printf("The ceiling of %f is %f.\n", y, ceil(y));
return 0;
}
Output:
The ceiling of 100.001000 is 101.000000.
The ceiling of 9.990000 is 10.000000.
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Last updated: August 16, 2000