C++ Math ceil() Functions

C++ Math ceil() Function with tutorial for beginners and professionals with examples on isgreaterequal(), less(), islessequal(), islessgreater(), isunordered(), exp(), frexp(), ldexp(), log(), log10(), modf(), exp2(), expm1(), log1p(), log2(), logb(), scalbn(), scalbln() etc.

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C++ Math ceil()

It rounds the value to the nearest integer which is not less than the given value.

For example :

ceil(8.1)=9.0;
ceil(-8.8)=-8.0;

Syntax

Suppose a number is 'x'. Syntax would be:

double ceil(double x);

Parameter

x : It is the value that rounds to the nearest integer.

Return value

It returns the smallest integer value not less than x.

Example 1

Let's see a simple example by considering the positive value of x.

#include 
#include
using namespace std;
int main()
{
  float x=9.2;
  std::cout << "Initial value of x is :"<

Output:

Initial value of x is :9.2
final value of x is :10

Example 2

Let's see a simple example by considering the negative value of x.

#include 
#include
using namespace std;
int main()
{
  float x=-2.2;
  std::cout << "Initial value of x is :"<

Output:

Initial value of x is :-2.2
final value of x is :-2

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