In this article, we will discuss how to create a JavaScript program to find the sum of natural numbers. The sum of natural numbers is an essential concept in mathematics and is widely used in various fields.

## What are Natural Numbers?

Natural numbers are positive integers that start from 1 and continue to infinity. The set of natural numbers is represented by the symbol N and is defined as N = {1, 2, 3, 4, 5, …}.

## Why is the Sum of Natural Numbers Important?

The sum of natural numbers is an essential concept in mathematics and is widely used in various fields, such as finance, physics, and engineering. For example, in finance, the sum of natural numbers can be used to calculate the total interest on a loan. In physics, the sum of natural numbers can be used to calculate the total energy of a system.

## JavaScript Program to Find the Sum of Natural Numbers

The following is a JavaScript program to find the sum of natural numbers:

```				```
function sumNaturalNumbers(n) {
let sum = 0;
for (let i = 1; i <= n; i++) {
sum += i;
}
return sum;
}

console.log(sumNaturalNumbers(5));  // Output: 15 (1 + 2 + 3 + 4 + 5)
console.log(sumNaturalNumbers(10));  // Output: 55 (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10)

```
```

In this program, we have defined a function `sumOfNaturalNumbers()` that takes an argument `n`, which is the number of natural numbers to be added. The function uses a for loop to iterate from 1 to `n` and adds each number to the `sum` variable. Finally, the `sum` variable is returned as the result of the function.

We discussed the concept of natural numbers and why the sum of natural numbers is important. We also created a JavaScript program to find the sum of natural numbers and showed how to use it. The sum of natural numbers is a simple concept, but it is the building block of many more complex mathematical concepts.