What is string interpolation in Ruby?

What is string interpolation in Ruby?

String interpolation in Ruby allows you to embed expressions within string literals. You can use #{expression} to include the result of an expression in a string.

Can you give me an example of string interpolation?

Sure! For instance, if you have a variable name = 'Alice', you can write "Hello, #{name}!" which will output Hello, Alice!.

Are there any differences between single and double quotes in Ruby regarding interpolation?

Yes, string interpolation only works with double-quoted strings. Single-quoted strings will treat the #{} as plain text.

What happens if I use an expression that returns nil?

If the expression returns nil, it will simply be replaced with an empty string in the output.