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Ruby program to check a given key is exist in the hash collection or not

Last Updated : December 15, 2025

Problem Solution

In this program, we will create a hash collection. Then we will check a given key is exists in the created collection or not using the key?() method and print an appropriate message.

Program/Source Code

The source code to check a given key exists in the hash collection or not is given below. The given program is compiled and executed on Windows 10 Operating System successfully.

# Ruby program to check a given key is exist 
# in hash collection or not

student = {"101" => "Amit", "102" => "Arun", "103" => "Sumit"};

if student.key?("102") == true
    puts "The key '102' exists.";
else
    puts "The item '102' does not exist.";
end

Output

The key '102' exists.

Explanation

In the above program, we created a hash collection to store student information. Then we checked a given key is exist in the created hash collection using key?() method and printed the appropriate message.

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