**How do we use the Math.sqrt() method to get the square root of a number in JavaScript?**

In this article, you’ll learn how to calculate square roots with ease and boost your coding skills.

Aside from that, you’ll find out **how to square a number in JavaScript**. Read on to explore more!

Let’s get started to find out how to calculate the square root of a number in JavaScript using the **Math.sqrt() method.**

**What is Math.sqrt in JavaScript?**

The **Math.sqrt() is a built-in static method in JavaScript **that is used to calculate the square root of a number.

The term **“static”** means that the method belongs to the Math object itself, and not to an instance of the Math object.

That’s the reason why we call it using **Math.sqrt()** and not on a Math object that we created.

**What is math sqrt syntax?**

Here’s the syntax of **Math,sqrt()** method:

**Math.sqrt(number) ✅**

**What is the Parameter?**

This function takes one parameter:

**number**

This is the number you want to find the square root of. It should be a non-negative number.

**What is the return value?**

The** Math.sqrt() **method returns the square root of the number provided. If the number is negative, it returns NaN (Not a Number).

**Supported Browser**

✔ Chrome

✔ Edge

✔ Firefox

✔ Internet Explorer

✔ Safari

✔ Opera

**How does Math.sqrt () method work?**

The **sqrt() **method short for **“square root”**, is a mathematical method that returns the square root of a given number.

In other words, it finds a value that, when multiplied by itself, gives the original number.

Here’s a simple example: the square root of 49 is 7 because 7 * 7 equals 49.

In JavaScript, you can use the **Math.sqrt() method** to calculate the square root of a number.

**Here’s how it works:**

**let samplenumber = 64;
console.log(Math.sqrt(samplenumber));** ✅

**Output:**

**8**

If you try to find the square root of a negative number, the function will return NaN, which stands for “Not a Number,” because square roots of negative numbers are not real numbers.

**Here’s an example:**

**let samplenumber = -64;
console.log(Math.sqrt(samplenumber));** ✅

**Output:**

**NaN**

**Here are the other examples:**

**Math.sqrt(-81); // NaN
Math.sqrt(-0); // -0
Math.sqrt(0); // 0
Math.sqrt(1); // 1
Math.sqrt(2); // 1.414213562373095
Math.sqrt(16); // 4
Math.sqrt(Infinity); // Infinity**

**Frequently Asked Question (FAQs)**

**How to square in JavaScript?**

You can square a number in JavaScript using the exponentiation operator (**).

**Here’s an example:**

**let samplenum = 9;
let square = samplenum ** 2; ✅
console.log(square);**

**Output:**

**81**

In our example, 9 ** 2 returns 81, because 9 * 9 is equal to 81.

**What is the square root of 2 in JavaScript?**

You can calculate the square root of a number in JavaScript using the Math.sqrt() method.

Here’s how you can find the square root of 2:

**let samplenumber = 2;
console.log(Math.sqrt(samplenumber)); ✅**

**Output:**

**1.4142135623730951**

As you can see in our example** Math.sqrt(2)** returns approximately 1.4142135623730951, because that is the square root of 2.

**Conclusion**

We’ve explored the **Math.sqrt() method in JavaScript**, which is used for calculating the square root of a number.

We’ve discussed its syntax, parameters, and return values and provided various examples.

Also, we illustrate **how to square a number in JavaScript and calculate the square root of 2**.

Please note that the **Math.sqrt()** is a static method, meaning it belongs to the Math object itself and not to an instance of the Math object.

It returns **NaN **for negative numbers as they do not have real square roots.

We are hoping that this article provides you with enough information that help you understand the **Math.sqrt() method in JavaScript.**

If you want to dive into more JavaScript topics, check out the following articles:

- What is Math.power or Math.pow() Method in JavaScript?
- Math.max in JavaScript
- Math random in JavaScript

**Thank you for reading Itsourcecoders** 😊.