difference between = and == ?

Answer 1

One assigns the value of RHS to a variable the other one compares the values like:

var a = 9 // set a's value as 9
if ("2" == 2) alert("string 2 is equal to 2")
// check if string 2 is equal to 2, it will be equal in JavaScript.

Answer 2

= is assignment operator
== is reference comparison

Answer 3

@Lord Krishna sorry bro..

Answer 4

= is gir assigning the item on its right to the idenifiet to its left.
== tests to see if the left and right items are equal.