C++ Math llrint
The function will round the provided value based on the current rounding mode and output a value of type long long int.
Syntax
Suppose a number is 'x'. Syntax would be:
Example
long long int llrint(data_type x);
Parameter
x : The value which is to be rounded.
Return value
It provides the integer value closest to 'x' after rounding, and the return type of the value is long long int.
Example 1
Let's examine a straightforward illustration where the rounding direction is upward.
Example
#include <iostream>
#include<math.h>
#include<cfenv>
using namespace std;
int main()
{
float x=5.3;
std::cout << "Value of x is :" << x<<std::endl;
fesetround(FE_UPWARD);
cout<<"Rounded value of x is :"<<llrint(x);
return 0;
}
Output:
Output
Value of x is :5.3
Rounded value of x is :6
Example 2
Let's examine a basic scenario where the rounding direction is floor.
Example
#include <iostream>
#include<math.h>
#include<cfenv>
using namespace std;
int main()
{
double x=7.9;
std::cout << "Value of x is :" << x<<std::endl;
fesetround(FE_DOWNWARD);
cout<<"Rounded value of x is :"<<llrint(x);
return 0;
}
Output:
Output
Value of x is :7.9
Rounded value of x is :7
