Step by Step solution about How to resolve the algorithm String append step by step in the Ruby programming language

In Ruby, string concatenation (+) and string appending (<<) operators have different effects.

• Concatenating two strings creates a new string, leaving the originals unchanged.
• Appending to a string modifies the original string (s) in place, without creating a new object.

In this example:

s = "Hello wo"
s += "rld" # new string object

s += "rld" concatenates "Hello wo" with "rld", resulting in a new string "Hello world". The original string s remains unchanged and still holds the value "Hello wo".

s << "!"   # mutates in place, same object

In contrast, s << "!" appends the exclamation mark to the end of s, instead of creating a new string. This action modifies s in place, and the original string now becomes "Hello world!".

puts s

Finally, puts s displays the value of the modified string, which is "Hello world!".

s = "Hello wo"
s += "rld" # new string object
s << "!"   # mutates in place, same object
puts s