In this article, we’ll discuss the different methods for adding two numbers in JavaScript and provide step-by-step instructions for each method. Whether you’re a beginner or an experienced programmer, you’ll find all the information you need to get started with adding numbers in JavaScript.

JavaScript is a universal programming language used for various purposes, including adding two numbers. This simple operation can be performed using several different techniques, depending on your level of experience and the specific requirements of your project.

## Method 1: Basic Arithmetic

Using basic arithmetic is the simplest way to add two numbers in JavaScript. To perform this operation, use the + operator to add the two numbers together. For example, to add the numbers 3 and 4, you would write the following code:

```				```
var x = 3;
var y = 4;
var z = x + y;

```
```

In this example, the variable `x` is assigned the value 3, the variable `y` is assigned the value 4, and the variable `z` is assigned the result of `x + y`, which is 7.

## Method 2: The parseInt() Function

Another standard method for adding two numbers in JavaScript is to use the `parseInt()` function. This function can convert a string into an integer, which can then be used in arithmetic operations. For example, to add the numbers 3 and 4, you would write the following code:

```				```
var x = "3";
var y = "4";
var z = parseInt(x) + parseInt(y);

```
```

In this example, the variables `x` and `y` are both strings, but the `parseInt()` function is used to convert them into integers. The result of this operation is then added together, resulting in the value 7.

## Method 3: The Number() Function

A third method for adding two numbers in JavaScript is to use the `Number()` function. This function can convert a variety of data types into a number, including strings and booleans. For example, to add the numbers 3 and 4, you would write the following code:

```				```
var x = "3";
var y = "4";
var z = Number(x) + Number(y);

```
```

In this example, the variables `x` and `y` are both strings, but the `Number()` function is used to convert them into numbers. The result of this operation is then added together, resulting in the value 7.

## Method 4: The eval() Function

The `eval()` function is another option for adding two numbers in JavaScript. This function can evaluate a string as a JavaScript expression, including arithmetic operations. For example, to add the numbers 3 and 4, you would write the following code:

```				```
var x = "3";
var y = "4";
var z = eval("x + y");

```
```

In this example, the variables `x` and `y` are both strings, but the `eval()` function is used to evaluate the string “x + y” as a JavaScript expression. The result of this operation is then assigned to the variable `z`, resulting in the value 7.

## Example with input

```				```
return num1 + num2;
}

var num1 = parseInt(prompt("Enter the first number:"));
var num2 = parseInt(prompt("Enter the second number:"));

Let’s take a closer look at the code and understand how it works. The `addNumbers` function takes two arguments, `num1` and `num2`, and returns their sum. The `parseInt` function is used to convert the input from the user into a number. The `prompt` function is used to display a pop-up window asking the user to enter a number. The result of the addition is then stored in the `result` variable and displayed using the `alert` function.