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If Else Statement in JavaScript

Conditional Statements

The conditional statements are used to perform different actions for different decisions.

Just like any other languages, JavaScript has the following conditional statements:

  • if for specifying a block of code to be executed, when a specified condition becomes true
  • else to specify a block of code to be executed, when the condition is false
  • else if (nested if) for specifying a new condition to test, when the first condition becomes false

The if Statement

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

Syntax of if statement

Example

Make a “Good Morning” greeting if the hour is greater than 06:00:

The if else Statement

Use of else statement for specifying a block of code to be executed when the condition becomes false.

Syntax of if else statement

Example of if else

If the hour is less than 12, create a “Good Morning” greeting, otherwise “Good Afternoon”:

The else if Statement

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

Syntax

Example of else if

If time is less than 12:00, create a “Good morning” greeting, if not, but time is less than 18:00, create a “Good day” greeting, otherwise a “Good evening”:

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