What is if-else in JavaScript?

The if-else statement helps your program decide:

• If a condition is true → run one block of code

• Otherwise → run a different block of code

This makes your programs smarter and more interactive.

Basic Syntax

Simple Example

This example clearly shows how the program chooses one result.

You will use if-else in:

• Login systems

• Form validation

• Showing error or success messages

• Games and interactive apps

Without if-else, programs would always behave the same way.

The if-else statement is one of the most important building blocks in JavaScript. Once you understand it, learning more advanced logic like else if, loops, and functions becomes much easier.