how to convert string to int js

How to Convert String to Int in JavaScript

If you have a string variable in JavaScript and you want to convert it into an integer, there are several ways to do it. Let's take a look at some of the most common methods:

Method 1: parseInt()

The parseInt() function is used to convert a string to an integer in JavaScript. Here's how it works:

    let str = "123";
    let num = parseInt(str);
    console.log(num); // Output: 123
  

Method 2: Number()

The Number() function is another way to convert a string to an integer in JavaScript:

    let str = "123";
    let num = Number(str);
    console.log(num); // Output: 123
  

Method 3: Unary Plus Operator

You can also use the unary plus operator (+) to convert a string to an integer:

    let str = "123";
    let num = +str;
    console.log(num); // Output: 123
  

Method 4: Using the Bitwise Operator

Another way to convert a string to an integer is by using the bitwise operator. This method is not recommended as it is not very efficient and can cause unexpected results for large numbers:

    let str = "123";
    let num = ~~str;
    console.log(num); // Output: 123
  

So, these are some of the most common ways to convert a string to an integer in JavaScript. You can choose the method that suits your needs the best.