How Can I Remove The Decimal Part From Javascript Number

In JavaScript, numbers often come with decimal parts, which might not always be necessary for certain functions or calculations. If you're wondering how to remove the decimal part from a JavaScript number, you're in the right place! Fortunately, there are a few simple methods you can employ to achieve this. Let's delve into these techniques to help you clean up those numbers effectively.

One relatively straightforward way to remove the decimal part from a JavaScript number is by using the `Math.floor()` function. This function will round down a number to the nearest integer, effectively cutting off the decimal part. Here's a quick example to illustrate this:

let num = 25.78;
let wholeNum = Math.floor(num);
console.log(wholeNum); // Output will be 25

In this example, `Math.floor(num)` removes the decimal part from `num`, resulting in `25`. It's a simple and effective method, especially if you want to truncate the decimal part without rounding the number.

Another method to remove the decimal part from a JavaScript number is to use the `parseInt()` function. This function parses a string argument and returns an integer. When used on a string representation of a number, `parseInt()` effectively truncates the decimal part. Here's an example to demonstrate this:

let num = 39.99;
let wholeNum = parseInt(num);
console.log(wholeNum); // Output will be 39

In this code snippet, `parseInt(num)` converts the floating-point number `39.99` to an integer, effectively removing the decimal part.

If you prefer to retain the integer part as a number instead of a string, you can multiply the number by `1` after using `parseInt()`. This simple trick will cast the result back to a number data type. Here's how you can do it:

let num = 53.45;
let wholeNum = parseInt(num) * 1;
console.log(wholeNum); // Output will be 53

By multiplying the result of `parseInt(num)` by `1`, the string is converted back to a number without the decimal part.

In conclusion, removing the decimal part from a JavaScript number is a common task, and thankfully, there are several easy methods to achieve this. Whether you prefer using `Math.floor()` or `parseInt()`, both options provide efficient ways to truncate the decimal part and work with whole numbers in your JavaScript code. Remember to choose the method that best suits your specific requirements and happy coding!