Conditional statements in JavaScript allow for the execution of different blocks of code based on whether a specified condition evaluates to true or false. These statements are fundamental for controlling the flow of a program.

In JavaScript, conditional statements are used to perform different actions based on different conditions.

Here are the most common types:

1. if Statement

The if in javascript is the most simple decision-making statement. It consists of the test condition and if block or body. If the given condition is true only then the if block will be executed.

2. if...else Statement

Executes one block of code if the condition is true, otherwise another block.

 3. if...else if...else Statement

Checks multiple conditions.

4. switch Statement

Used to perform different actions based on different values.

5. Ternary Operator (short if-else)

A compact syntax for if...else.