ceil function
ceil c
The C++
ceil()function returns the smallest possible integer value which is greater than or equal to the given argument. It is defined in the<cmath>header file.
Syntax
ceil(double num);
Parameters
The ceil() function takes a one argument which num is floating-point number whose ceiling value is to be round up.
Return value
Returns the smallest integral value that is not less than num.
double ceil
ceil() prototype
double ceil(double num); float ceil(float num); long double ceil(long double num); // for integral types double ceil(T num);
std ceil
Example 1 : C++ ceil()
#include <iostream> #include <cmath> using namespace std; int main() { double num = 11.11; double result = ceil(num); cout << "Ceil of " << num << " = " << result; return 0; }
Output
Ceil of 11.11 = 12
math ceiling
Example 2 : C++ ceil()
#include <stdio.h> #include <math.h> int main () { printf ("Ceil of 1.3 is %.1f\n", ceil(1.3) ); printf ("Ceil of 5.8 is %.1f\n", ceil(5.8) ); printf ("Ceil of -1.3 is %.1f\n", ceil(-1.3) ); printf ("Ceil of -5.8 is %.1f\n", ceil(-5.8) ); return 0; }
Output
Ceil of 2.3 is 2.0 Ceil of 3.8 is 6.0 Ceil of -2.3 is -1.0 Ceil of -3.8 is -5.0