Difference between '%{}', '%Q{}', '%q{}' in ruby string delimiters

Question

I was going through an online tutorial on ruby and found this \"General Delimited Strings\",

%{a word}  # => \"a word\"
%Q{a word} # => \"a word\"
%q{         


        

Answer 1

%q(no interpolation)

%Q(interpolation and backslashes)

%(interpolation and backslashes)

Example

$ str = 'sushant'

$ %q[#{str} "mane"]
 => "\#{str} \"mane\""

$ %Q[#{str} "mane"]
 => "sushant \"mane\""

$ %[#{str} "mane"]
 => "sushant \"mane\""

Answer 2

Here is some hints about them Ruby_Programming - The % Notation:

%Q[ ] - Interpolated String (default)

%q[ ] - Non-interpolated String (except for \ , [ and ])

Example :

x = "hi"
p %Q[#{x} Ram!] #= > "hi Ram!"
p %q[#{x} Ram!] #= > "\#{x} Ram!"
p %Q[th\e] #= > "th\e"
p %q[th\e] #= > "th\\e" # notice the \\ with %q[]

Another good resource Percent Strings

Besides %(...) which creates a String, The % may create other types of object. As with strings, an uppercase letter allows interpolation and escaped characters while a lowercase letter disables them.