=== in JavaScript: Everything You Need to Know

=== in JavaScript: Everything You Need to Know

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The === operator is one of the most commonly used operators in JavaScript. But what does it actually do? In this blog post, we'll break down the === operator and explain everything you need to know about it.

What is ===? === is a comparison operator that checks if two values are equal. It also checks if the data types of the two values are the same. This is different from the == operator, which only checks for equality and doesn't care about data types.

Why Use === ? When you're writing code, it's important to use === instead of == because == can sometimes give unexpected results. For example, take a look at this code:

javascript: let x = 2; let y = "2"; x == y // true // not what we expected! x === y // false // this is what we expected

As you can see, when we use the == operator, it returns true even though x and y are not equal. This is because when we compare two values with different data types using ==, JavaScript converts one of the values to match the data type of the other value before doing the comparison. In this case, it converted y (a string) to a number so that it could compare it with x (also a number). That's why we got unexpected results.

But when we use ===, JavaScript doesn't convert any values before doing the comparison. So in our example above, x and y are not equal because they have different data types—one is a number and the other is a string—even though their values are both 2.

=== in JavaScript is a comparison operator that checks if two values are equal and if they have the same data type. It's important to use === instead of == because == can sometimes give unexpected results due to type conversion. We hope this blog post has been helpful in explaining what === means in JavaScript!

Thanks for reading my post xoxo Natasha