javascript !! meaning code example

Example 1: who created javascript

Brendan Eich

Example 2: founder of js

Brenden Eich is the founder of JavaScript and the amazing thing 
about him is He have developed JavaScript in just 10 Days

Example 3: != javascript

// " != " in Javasacript means : not equal.

Example 4: less than equal to in javascript

| <= | less than or equal to |	x <= 8 | true |

Example 5: js !==

var x = 5;

// === 	equal value and equal type
// e.g. 1. 
x === 5 returns true

// e.g. 2.
x === "5" returns false

// !== not equal value or not equal type
// e.g. 1.
x !== 5 returns false

// e.g. 2.
x !== "5" returns true

// e.g. 3.
x !== 8 returns true