Pure vs Impure function

index.js

/**
Characteristics of Pure Function:

The return value of the pure func­tions solely depends on its arguments Hence, if you call the pure func­tions with the same set of argu­ments, you will always get the same return values.

They do not have any side effects like net­work or data­base calls

They do not mod­ify the argu­ments which are passed to them
Char­ac­ter­isitcs of Impure functions

The return value of the impure func­tions does not solely depend on its arguments Hence, if you call the impure func­tions with the same set of argu­ments, you might get the dif­fer­ent return values For exam­ple, Math.random(), Date.now()

They may have any side effects like net­work or data­base calls

They may mod­ify the argu­ments which are passed to them
**/