how to check not equal in javascript code example

Example 1: js logical operators

Javascript Logical Operators
&& Logical and
|| Logical or
! Logical not

Example 2: javascript does not equal

!= not equal 
!== not equal value OR type

Example 3: != javascript

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

Example 4: javascript not equal

0 !== "0"
0 !== 0