Understanding the Difference Between == and === in JavaScript

JavaScript provides two comparison operators, namely '==' and '==='. Both are used to compare two values, but they work differently.

Double Equals (==) Operator

It is also known as loose equality operator. It compares two operands for equality after converting them to a common type.

For Example - If the two operands are of different types, then the JavaScript engine will convert one of the operands to the same type as the other operand.

10 == '10'     // output=========> true 

//Reason - because the number 5 is converted to the string 5

Triple Equals (===) Operator

It is also known as strict equality operator. It compares two operands for equality without converting them to a common type.

For Example - If the two operands are of different types, then it will return false.

10 == '10'     // output=========> false 

//Reason - because both the operands are of different data types

It is generally recommended to use the triple equal operator whenever possible to avoid unexpected behavior due to type coercion.

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