Ruby program to convert given string to upper case

Following program shows you how to convert given string to upper case.
In this program we get string from user and convert that string to upper case using .upcase

puts "Please enter a string:"
input = gets.to_s.strip
upperCase = input.upcase      
puts "Given string to upper case: #{upperCase}"

Output:

Please enter a string:
hello
Given string to upper case: HELLO