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Closures in Scala (and All FP Languages)

Pallav Gupta explains what a closure is:

Objects are more flexible for certain use cases because they carry both data members and member functions, whereas a function does not have data members.

So if there is a requirement to pass data members along with functions, How will we achieve it in functional programming ?

The answer is yes, we can achieve it using a closure and a free variable.

Read on for an example.