C++ <cmath> - round() Function

The C++ <cmath> round() function returns an integral value that is nearest to the argument value, regardless of the current rounding mode. In halfway cases, the argument is rounded away from zero.

Syntax

C++11

double round (double x);
float round (float x);
long double round (long double x);
double round (T x);

Parameters

`x`	Specify a value to round.

Return Value

Returns an integral value by rounding up the x to the nearest integral value.

Example:

In the example below, round() function is used to round the given number.

#include <iostream>
#include <cmath>

using namespace std;

int main (){

  cout<<"round(10.2): "<<round(10.2)<<"\n";
  cout<<"round(10.8): "<<round(10.8)<<"\n";
  cout<<"round(-5.2): "<<round(-5.2)<<"\n";
  cout<<"round(-5.8): "<<round(-5.8)<<"\n";
  return 0;
}

The output of the above code will be:

round(10.2): 10
round(10.8): 11
round(-5.2): -5
round(-5.8): -6

❮ C++ <cmath> Library