JavaScript if else Statement

February 8, 2021 10:45 am IST

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JavaScript if else Statement

The if statement will be executed if a specified condition is true. Otherwise, the else statement will be executed.

Without Using Curly Brackets

Note: It is not necessary to use open and close curly brackets if you want to execute just one statement in the if and else block.

Example

HTML Online Editor

<!DOCTYPE html> <html> <body> <p>Try to change "num = 150" to "num = 50"</p> <p id="point"></p> <p id="point1"></p> <script> var x = document.getElementById("point"); var y = document.getElementById("point1"); var num = 150; if(num < 100) x.innerText = "num is less than 100"; else x.innerText = "num is greater than 100"; y.innerText = "I will always execute"; </script> </body> </html>

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Syntax

if(condition) // one line code else // one line code

Using Curly Brackets

Note: It is necessary to use open and close curly brackets if you want to execute more than one statement in the if and else block.

Example

HTML Online Editor

<!DOCTYPE html> <html> <body> <p>Try to change "num = 150" to "num = 50"</p> <p id="point"></p> <p id="point1"></p> <script> var x = document.getElementById("point"); var num = 150; var txt = ""; if(num < 100){ txt = "num is less than 100"; x.innerText = txt; } else{ txt = "num is greater than 100"; x.innerText = txt; } y.innerText = "I will always execute"; </script> </body> </html>

Run