JavaScript if else and else if

Conditional Statements

Conditional statements are used to perform different actions based on different conditions.

Very often when you write code, you want to perform different actions for different decisions.

You can use conditional statements in your code to do this.

In JavaScript we have the following conditional statements:

• Use if to specify a block of code to be executed, if a specified condition is true
• Use else to specify a block of code to be executed, if the same condition is false
• Use else if to specify a new condition to test, if the first condition is false
• Use switch to specify many alternative blocks of code to be executed

The switch statement is described in the next chapter.

---

The if Statement

Use the if statement to specify a block of JavaScript code to be executed if a condition is true.

Syntax

Note that if is in lowercase letters. Uppercase letters (If or IF) will generate a JavaScript error.

Example

Try it now

The result of greeting will be:

Good day

The else Statement

Use the else statement to specify a block of code to be executed if the condition is false.

If the hour is less than 18, create a "Good day" greeting, otherwise "Good evening":Example

Try it now

The result of greeting will be:

Good day

The else if Statement

Use the else if statement to specify a new condition if the first condition is false.

Syntax

Example

Try it now

The result of greeting will be:

Good day

Practice Excercise Practice now