concatenate a string in Ruby

  word1 = "Hello "
  word2 = "World!"
  word3 = word1 + word2

The code above is an example of how to concatenate a string in Ruby. The first two lines initialize two strings to the variables word1 and word2. On the third line, the two strings are combined into a third variable, word3, using the + operator. This will result in the string “Hello World!” being stored in the word3 variable. This is a simple yet useful way of combining two strings into a single string in Ruby.