Functions with Multiple Arguments

Now that we know about tuples, let’s see how we can use them in functions. In principle, there are two use cases:

1. using tuples as the argument type of functions to write functions that take multiple parameters.
2. using tuples as the return type of functions to write functions that have multiple results.

Tuples as arguments

Let’s write a function which computes the perimeter of a rectangle when given its two sides a and b: