What is function currying in Scala

Question

Can anyone explain with an example how currying function in Scala used?

Answer 1

Hi,

With Scala Currying, we can take a function that takes multiple arguments and turns it into a series of functions that take single arguments each. These come in handy working with higher-order functions. With this, we can also fill in only the arguments we have yet.

scala> def mul(a:Int,b:Int)=a*b

mul: (a: Int, b: Int)Int

scala> mul(3,4)

The output will be:

Int = 12

There is another way to do this mention below:

scala> def mul(a:Int)(b:Int)=a*b

mul: (a: Int)(b: Int)Int

scala> val mid=mul(3)(_)

mid: Int => Int = $$Lambda$1540/90644757@43fe3f7

scala> mid(4

The output will be same:

Int =12

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