How do you round the number 5.35 to the nearest integer?

# Understanding Math.round in JavaScript

The correct way to round a number to the nearest integer in JavaScript is by using the `Math.round()` function. JavaScript's built-in `Math` object has several useful methods, and `Math.round()` is one of them.

`Math.round()` works by rounding a number to the nearest integer. If the fractional part is 0.5 or more, it rounds the number upward to the nearest integer. If the fraction part is less than 0.5, it rounds downward.

For example, when you apply `Math.round(5.35)`, the returned result will be `5` since the decimal part `.35` is less than `.5`. Therefore, JavaScript rounds the number downwards to the nearest lower whole number.

Here is how you implement it in a specific case:

``````var num = 5.35;
var roundedNum = Math.round(num);
console.log(roundedNum); // Output: 5
``````

The number ` 5.35` is stored in the variable `num`. Then, the `Math.round()` function is called with `num` as the argument to round this number to the nearest integer. The result is then stored in the `roundedNum` variable. Finally, the `console.log()` function is used to print the result in the JavaScript console.

The `Math.round()` function is a versatile and commonly used function in JavaScript when dealing with numbers. It's particularly handy when you need to perform calculations that require integer values or when you need to display numerical data in a more reader-friendly format that does not include decimals.

Strong understanding and effective usage of JavaScriptâ€™s `Math` object, along with its numerous methods like `Math.round()`, are key best practices in coding. They help increase the efficiency of your code and allow you to handle numerical operations with ease. The `Math` object's pre-built methods save substantial time as compared to creating custom functions to perform these tasks.