What does == and === mean?

The === or identity operator compares the identity of the objects . It checks whether the operands refer to the same object. As you can see, arr1 and arr2 do not refer to the same object, despite the objects being equal.

== is used for comparison between two variables irrespective of the datatype of variable. === is used for comparision between two variables but this will check strict type, which means it will check datatype and compare two values.

== is used to check if two variables are equal i.e 2 == 2 . But in case of === it stands for equality i.e if two instances referring to the same object example in case of classes a reference is created which is held by many other instances. Follow this answer to receive notifications.2 Haz 2014

In programming languages == sign or double equal sign means we are comparing right side with left side . And this comparison returns true or false. We usually use this comparison inside if condition to do something specific. Double equal operator is a very common used operator after single equal.