• If the user is logged in, show the dashboard

• If the password is wrong, show an error

• If marks are above 90, show grade A

This is exactly where conditionals in JavaScript are used.

What are Conditionals in JavaScript?

Conditionals allow your program to run different code based on different conditions.

Think of it like real life decisions:

Example:

If it is raining → take an umbrella
Else → go normally

JavaScript provides a few ways to write such logic

In this tutorial you are going to learn about the following conditionals in JavaScript:

1 If

2 If-Else

3 Ternary

4 Switch

5 Booleans

6 Logical

Why Conditionals Matter in Real Projects

You use conditionals everywhere:

• Login systems

• Form validation

• Showing/hiding UI elements

• Role-based dashboards

• API response handling

Without conditionals, applications would not be dynamic.