Scala – Higher Order Function

Higher order Function is a functional programming principle that takes other functions as arguments or returns a function as output.

Assume that we have a list of strings and want to iterate it and append and prepend $ symbol to each value and collect the modified values as a list.

Refer the below example to know how we can do that with the higher-order function principle.

In the above example, “modifyList” is a higher order function as it takes the “format” function as an argument. Inside the “format” function, we perform an append and a prepend operation to each value.