C++ Math nexttoward

The nexttoword function represents the next representable value in a specific direction. The nextafter and nexttoward both the functions work similar and return the same value. The only difference occurs in their syntax.

Syntax

float nexttoward(float from, long double to);
 double nexttoward(double from, long double to);
long double nexttoward(long double from, long double to);
double nexttoward(integral from, long double to);

Parameter

( from , to ) : These are the floating point values.

Return value

• ✅ If 'from' equals to 'to', then it returns the value of 'from'.
• ✅ If no error occurs, then the next representable value of 'from' is returned.

Example

Let's see a simple example.

#include <iostream>
#include<math.h>
using namespace std;

int main()
{
        long double from=0.0;
        double to= -1.0;
        cout<<"Values of from and to are:"<<from<<", "<<to<<'\n';
        cout<<nexttoward(from,to);
        return 0;
}

Output:

Values of from and to are:0, -1
-3.6452e-4951

In the above example, the 'from' and 'to' are of different type. The nexttoward function returns the value i.e -3.6452e-4951.