String concatenation program in swift language

String concatenation program in swift language. This means the two different strings were merged to a single word is concatenation. This program is to add two different set of words into a single word. This is a basic set of program in every programming language for beginners.

let Hstr = "Hello"
let Wstr = "world!"
var result = Hstr + Wstr
print(result)
Output:

Helloworld!