How to Check if String contains only Alphabets in Ruby - Step by Step Examples

How to Check if String contains only Alphabets in Ruby ?

Answer

To check if a string contains only alphabets in Ruby, you can use regular expressions or iterate through each character and check if it is an alphabet using functions like String#each_char.

✐ Examples

1 Check if String contains only Alphabets using regular expression

In this example,

We create a regular expression pattern that matches alphabets only.
We use the String#match? method to check if the string matches the pattern.
If the string contains only alphabets, we set contains_only_alphabets to true, otherwise false.
Finally, we print the result to the console.

Ruby Program

str = "Hello123"
contains_only_alphabets = !str.match?(/[^A-Za-z]/)
puts "String contains only alphabets: #{contains_only_alphabets}"

Output

String contains only alphabets: false

2 Check if String contains only Alphabets using loop to check each character

In this example,

We create a string named str with a value of "Hello123".
We iterate through each character in the string using String#each_char method.
If any character is not an alphabet, we set contains_only_alphabets to false and break the loop.
Finally, we print the result to the console.

Ruby Program

str = "Hello123"
contains_only_alphabets = true
str.each_char do |c|
  if !c.match?(/[A-Za-z]/)
    contains_only_alphabets = false
    break
  end
end
puts "String contains only alphabets: #{contains_only_alphabets}"

Output

String contains only alphabets: false

Summary

In this tutorial, we learned How to Check if String contains only Alphabets in Ruby language with well detailed examples.

◀ Previous Next ▶

Ruby Tutorials

Ruby How-Tos

How to Check if String contains only Alphabets in Ruby - Step by Step Examples

How to Check if String contains only Alphabets in Ruby ?

Answer

✐ Examples

1 Check if String contains only Alphabets using regular expression

Ruby Program

Output

2 Check if String contains only Alphabets using loop to check each character

Ruby Program

Output

Summary

More Ruby Strings Tutorials