Unlocking the Power of Square Roots in JavaScript

The Math Behind the Magic

To find the square root of a number in JavaScript, you can utilize the built-in Math.sqrt() method. This powerful function takes a single argument – a number – and returns its square root. The syntax is straightforward:

Math.sqrt(number)

Putting it into Practice

Let’s dive into some examples to see how Math.sqrt() works its magic. In our first example, we’ll calculate the square root of a simple number:

console.log(Math.sqrt(16)); // Output: 4

But what happens when we pass in different data types? Let’s explore:

console.log(Math.sqrt(-1)); // Output: NaN
console.log(Math.sqrt("four")); // Output: NaN

As we can see, if we pass a negative number or a string into the Math.sqrt() method, it returns NaN (Not a Number).

Understanding the Rules

So, what are the rules for using Math.sqrt()? Here’s a quick rundown:

• If you pass 0 or a positive number, the method returns the square root of that number.
• If you pass a negative number, the method returns NaN.
• If you pass a string, the method returns NaN.

By mastering the Math.sqrt() method, you’ll be able to tackle a wide range of mathematical challenges in JavaScript. Want to take your skills to the next level? Check out our article on solving quadratic equations in JavaScript!