How to Find Length of String in Ruby: Simple Guide

In Ruby, you can find the length of a string using the .length method. This method returns the number of characters in the string as an integer.

Syntax

The syntax to find the length of a string in Ruby is simple. You call the .length method on any string object.

• string.length: Returns the number of characters in string.

ruby

string = "hello"
length = string.length

Example

This example shows how to use the .length method to get the number of characters in a string and print it.

ruby

name = "Ruby"
puts "The length of '#{name}' is #{name.length}."

Output

The length of 'Ruby' is 4.

Common Pitfalls

One common mistake is confusing .length with .size. In Ruby, both work the same for strings, but .length is clearer for beginners.

Another pitfall is forgetting that .length counts all characters including spaces and special characters.

ruby

text = "hello world"
puts text.length  # Correct: counts all characters including space

# To get length without spaces
puts text.length - text.count(' ')

Output

11
10

Quick Reference

Use .length to get the number of characters in a string. It returns an integer. Spaces and special characters are included in the count.

Method	Description	Example	Output
.length	Returns number of characters in string	"hello".length	5
.size	Alias for .length, same result	"hello".size	5

Key Takeaways

Use the .length method to find the number of characters in a Ruby string.

.length counts all characters including spaces and special symbols.

.size is an alias of .length and works the same way.

Remember to call .length on a string object, not on nil or other types.