Math nexttoward() function in C++

In this tutorial, we will learn about how to use the nexttoward() function in C++. So continue through this article…

nexttoward() function in C++

The nexttoward() function takes two arguments and returns the next value after the x in the direction of y. It works in a similar way to nextafter() function, but it returns the more accurate value of y.

The syntax of this function is:

nexttoward(x, y);

Where

x is the base value.
y is the approximated return value.

Return value: Based on the input data type, it returns the next value of x.

Header File used is:

#include <cmath>
      or
#include <math.h>

This header file contains a large number of useful mathematical functions such as sqrt() which calculates the square root or exp() etc.

Write our C++ code for understanding

Now, let us write the code to illustrate the same. Look at our program:

#include <iostream>  
#include <cmath>  
using namespace std;  
  
int main()  
{  
  long double x=0.0;        //x= from
  double y= -1.0;           //y= to
  cout<<"Values of x (from) and y (to) are:"<<x<<", "<<y<<'\n';  
  cout<<nexttoward(x,y);  
  return 0;  
}

Now see our output result for the above code:

Values of x (from) and y (to) are:0, -1
-3.6452e-4951

Explanation: 

In the above C++ program, first of all, we use the header file <cmath> which contains all the mathematical functions in it. Then, we declared the value of x and y with their respective data types. By using the nexttoward() function we find the next value after x in the direction of y and print the output value on the screen.

I hope that this tutorial will help you to solve your problem.

Also Read:

Implementing Vector as a stack in C++.