prepend a string to the beginning of another string in ruby

To prepend a string to the beginning of another string in Ruby, you can use the prepend method or the + operator. Here are examples of both methods:

main.rb
# Using prepend method
str1 = "world"
str1.prepend("Hello ")
puts str1   #=> "Hello world"

# Using + operator
str2 = "world"
str2 = "Hello " + str2
puts str2   #=> "Hello world"
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Both of these methods will produce the same result, which is Hello world. The prepend method adds the string at the beginning of the receiver, while the + operator join both strings, returning a new string that has the combined value of both.