# How to use Round, Random, Min and Max in JavaSript

Round, Random, Min and Max are the methods used in math object in JavaScript. Math object allows you to perform common mathematical tasks. The math object includes several mathematical values and functions. Yo do not need to define the math object before using it. In this post I am describing How to use Round, Random, Min and Max in JavaScript.

### How to use Round() in JavaScript

Using round() method in math object, you can round the given numbers as given below.

<script>
document.write(Math.round(0.60) +”<br/>”);
document.write(Math.round(0.40) +”<br/>”);
document.write(Math.round(0.49) +”<br/>”);
document.write(Math.round(-3.69) +”<br/>”);
document.write(Math.round(-6.10) +”<br/>”);
</script>

#### Preview:

document.write(Math.round(0.60) +”
“);
document.write(Math.round(0.40) +”
“);
document.write(Math.round(0.49) +”
“);
document.write(Math.round(-3.69) +”
“);
document.write(Math.round(-6.10) +”
“);

### How to use Random() in JavaScript

You can use the random() method in math object,you can return a random number between 0 and 1 as given below.

<script>
document.write(Math.random());
</script>

#### Preview:

document.write(Math.max(9,3) +”
“);
document.write(Math.max(-5,7) +”
“);
document.write(Math.max(10,21) +”
“);
document.write(Math.max(-5,-9) +”
“);
document.write(Math.max(6.12,7.98) +”
“);

### How to use Max() in JavaScript

Using max() method in math object, you can return the number with the highest value of two specified numbers as the following.

<script>
document.write(Math.max(9,3) +”<br/>”);
document.write(Math.max(-5,7) +”<br/>”);
document.write(Math.max(10,21) +”<br/>”);
document.write(Math.max(-5,-9) +”<br/>”);
document.write(Math.max(6.12,7.98) +”<br/>”);
</script>

#### Preview:

document.write(Math.min(9,3) +”
“);
document.write(Math.min(-5,7) +”
“);
document.write(Math.min(10,21) +”
“);
document.write(Math.min(-5,-9) +”
“);
document.write(Math.min(6.12,7.98) +”
“);

### How to use Min() in JavaScript

Using min() method in math object, you can return the number with the highest value of two specified numbers as the following.

<script>
document.write(Math.min(9,3) +”<br/>”);
document.write(Math.min(-5,7) +”<br/>”);
document.write(Math.min(10,21) +”<br/>”);
document.write(Math.min(-5,-9) +”<br/>”);
document.write(Math.min(6.12,7.98) +”<br/>”);
</script>

#### Preview:

document.write(Math.min(9,3) +”
“);
document.write(Math.min(-5,7) +”
“);
document.write(Math.min(10,21) +”
“);
document.write(Math.min(-5,-9) +”
“);
document.write(Math.min(6.12,7.98) +”
“);

There are also other more methods on JavaScript math object to perform common mathematical tasks which are listed below along with their description. You can use them as the methods given above.

• abs(x):  Returns the absolute value of a number
• ceil(x): Returns the value of a number rounded upwards to the nearest integer
• exp(x):  Returns the value or E^x.
• floor(x): Returns the value of a number rounded downwards to the nearest integer.
• log(x):  Returns the natural logarithm (base E) of a number.
• pow(x,y): Returns the value of x to the power of y.
• sqrt(x):  Returns the square root of a number.

Shuseel Baral is a web programmer and the founder of InfoTechSite has over 5 years of experience in software development, internet, SEO, blogging and marketing digital products and services is passionate about exceeding your expectations.