Explain the difference between == and === in JavaScript?

Question

Accepted Answer

In JavaScript, '===' checks for strict equality, while '==' checks for loose equality, allowing type coercion.

'===' checks both value and type, while '==' checks only value after type conversion.
Example of '===': 5 === '5' returns false because types are different (number vs string).
Example of '==': 5 == '5' returns true because '5' is coerced to a number.
'===' is generally preferred for avoiding unexpected results from type coercion.

Accepted Answer

== compares value only.
=== compares datatype and values.

Accepted Answer

The == operand loosely compares two values, thus it can be used in cases where the data type of the operand isn't important. For e.g., imagine a form entry where you've asked students their roll no. It is possible that some will enter it in string form and some in number form. In such cases, we can use the == operator to verify the data without the database.

The === operand strictly compares two values, thus it is used in the places where the data type of the operand is important. Imagine an online coding contest, where an answer is a number in string format. In that case, we'll use the === operator to compare and validate answers.

Accepted Answer

== is used for comparing two variables, but it ignores the datatype of variable.

=== is used for comparing two variables, but this operator also checks datatype and compares two values.

Accepted Answer

Both condition should be satisfied.

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Explain the difference between == and === in JavaScript?

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