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JavaScript if or multiple conditions

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Use OR (||) operator in if statement expression to get if or multiple conditions in JavaScript. In expression, if any one of the conditions is true, the result is true.

if(id != 1 || id != 2 || id != 3) //this returns true

The truth table for OR operator:

xyx || y

JavaScript if or multiple conditions

A simple example code gets numbers from array values is 20 or less than 10. The || operator short-circuits if the left condition is true.

<!DOCTYPE html>
   var arr = [5,25,70,62,20,89];

   arr.forEach(num => {
    if (num == 20 || num < 10){



JavaScript if or multiple conditions

Do comment if you have any doubts or suggestions on this Js condition statement code.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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