Problem Statement

Given a string and defined variables or values, string interpolation is the replacement of defined character sequences in the string by values or variable values.

Note: The task is not to create a string interpolation routine, but to show a language's built-in capability.

Let's start with the solution:

var extra = 'little';
say "Mary had a #{extra} lamb";


say ("Mary had a %s lamb" % 'little');