how to cut off decimals in javascript

How to cut off decimals in JavaScript

Dealing with decimal points can be a bit tricky in JavaScript, especially when we want to display numbers without any decimal points. Here, we will discuss how to cut off decimals in JavaScript.

The toFixed() Method

The toFixed() method is used to format a number with a specific number of digits after the decimal point. It returns a string representation of the number with the specified number of digits after the decimal point. Here's an example:

let num = 3.14159;
let n = num.toFixed(2);
console.log(n); // Output: "3.14"

In the above example, we have defined a variable 'num' with a value of 3.14159. Then we have used the toFixed() method to format the number with two digits after the decimal point. The output will be "3.14".

The Math.trunc() Method

The Math.trunc() method is used to remove the decimal part of a number and return the integer part. Here's an example:

let num = 3.14159;
let n = Math.trunc(num);
console.log(n); // Output: 3

In the above example, we have defined a variable 'num' with a value of 3.14159. Then we have used the Math.trunc() method to remove the decimal part and return the integer part. The output will be 3.

The parseInt() Method

The parseInt() method is used to parse a string and return an integer. If we pass a decimal number as a string to the parseInt() method, it will return the integer part of the number. Here's an example:

let num = "3.14159";
let n = parseInt(num);
console.log(n); // Output: 3

In the above example, we have defined a variable 'num' with a value of "3.14159" as a string. Then we have used the parseInt() method to parse the string and return an integer. The output will be 3.

Conclusion

In conclusion, we have discussed three different ways to cut off decimals in JavaScript. The toFixed() method is used to format a number with a specific number of digits after the decimal point, the Math.trunc() method is used to remove the decimal part of a number and return the integer part, and the parseInt() method is used to parse a string and return an integer. Depending on our use case, we can choose any of these methods to cut off decimals in JavaScript.