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Ruby program to check the input string contains numbers or letters using case statement

Last Updated : December 15, 2025

Problem Solution

In this program, we will read a string from the user and check the input string containing numbers or letters using the case statement.

Program/Source Code

The source code to check input string containing numbers or letters using the case statement is given below. The given program is compiled and executed successfully.

# Ruby program to check the input string contains 
# numbers or letters using case statement

print "Enter string: ";
str = gets.chomp;  

puts case 
when str.match(/\d/)
    "Input string contains numbers";    
when str.match(/[a-zA-Z]/)
    "Input string contains letters";    
else
    "Invalid choice";    
end

Output

Enter string: 1234
Input string contains numbers

Explanation

In the above program, we read a string from the user and check the input string contains numbers or letters using the case statement, and print the appropriate message.

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