Strings in Ruby can be defined using single or double quotes and contain variable names. The length of a string can be found using the length method, specific letters can be deleted using the delete method, strings can be substituted using gsub, and strings can be split into arrays using the split method as demonstrated in the examples.

1. Strings in Ruby
Strings in ruby are inside the quote. You can write the
variable name and then add the string in the quote.
e.g.
name = “willy wonka”
Length of the String
You can find the length of the string using
stingname.length
e.g.
name.length
Deleting Letters from the String
You can delete the specific letter from the string using
delete() method.
e.g.

2. name.delete('1')
Substitute Strings
You can use gsub in order to substitute the string in ruby.
e.g.
name.gsub(“wonka”, “wonka jr”)
Splitting String
You can split the string using split method.
e.g.
name.split(“,”)
Reference:
Ruby Strings, Variables, Arrays and Hash
http://onecore.net/ruby-strings-variables-arrays-and-hash.htm