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What’s the difference between equal to v/s strictly equal to and not equal to v/s strictly not equal to in any programming language?

This seems to be confusing at first, but if we execute a small example things get very clear about the working of these operators.

**==** is called equal to operator.

**!=** is called not-equal to operator.

**===** is called strictly equal to operator.

**!==** is called strictly not-equal to operator.

In this video tutorial we shall see the differences between == v/s === and != v/s !===

**Difference between != v/s !=== and == v/s ===**

$a = 1; $b = '1'; |

Lets assign integer 1 to variable a and string ‘1’ to variable b.

**Equal-to v/s Strictly Equal-to**

$a == $b true $a === $b false |

== operator doesn’t consider the type of variable strictly, thus returns true even though we are comparing a string with an integer. But === operator considers the type of the variable strictly and treats integer and string as two different things and hence returns false.

**Not Equal-to v/s Strictly Not Equal-to**

$a != $b false $a !== $b true |

Similarly, as != operator doesn’t take variable type into strict consideration it thinks $a and $b as equals, hence returns false, but !== returns true as it reads integer and string variables as different.