How to Create String in Ruby: Syntax and Examples

In Ruby, you create a string by enclosing text within "double quotes" or 'single quotes'. You can also use %q() or %Q() for alternative string creation methods.

Syntax

Ruby strings can be created using different ways:

• Double quotes: Allows string interpolation and escape sequences.
• Single quotes: Treats content literally, no interpolation.
• %q(): Creates a single-quoted string (no interpolation).
• %Q(): Creates a double-quoted string (supports interpolation).

ruby

str1 = "Hello, world!"
str2 = 'Hello, world!'
str3 = %q(Hello, world!)
str4 = %Q(Hello, #{"world"}!)

Example

This example shows how to create strings using different methods and how interpolation works with double quotes and %Q().

ruby

name = "Alice"
str1 = "Hello, #{name}!"
str2 = 'Hello, #{name}!'
str3 = %q(Hello, #{name}!)
str4 = %Q(Hello, #{name}!)

puts str1
puts str2
puts str3
puts str4

Output

Hello, Alice!
Hello, #{name}!
Hello, #{name}!
Hello, Alice!

Common Pitfalls

One common mistake is expecting string interpolation to work inside single quotes or %q() strings, but it does not. Also, forgetting to close quotes properly causes syntax errors.

ruby

name = "Bob"

# Wrong: no interpolation in single quotes
str_wrong = 'Hello, #{name}!'

# Right: interpolation works in double quotes
str_right = "Hello, #{name}!"

puts str_wrong
puts str_right

Output

Hello, #{name}!
Hello, Bob!

Quick Reference

Syntax	Description
"text"	Double-quoted string with interpolation and escapes
'text'	Single-quoted string, literal content
%q(text)	Single-quoted style string, no interpolation
%Q(text)	Double-quoted style string, supports interpolation

Key Takeaways

Use double quotes or %Q() for strings when you need interpolation or escape sequences.

Single quotes and %q() create literal strings without interpolation.

Always close your quotes properly to avoid syntax errors.

String interpolation only works inside double-quoted or %Q() strings.

Ruby offers flexible syntax options to create strings based on your needs.