Ruby program to get keys from a hash collection

Ruby Example: Write a program to get keys from a hash collection.
Submitted by Nidhi, on February 14, 2022

Problem Solution:

In this program, we will create a hash collection. Then we will get keys from the hash collection using the keys() method and print the result on the console screen. A hash collection stores information in the form of "Key/Value" pair.

Program/Source Code:

The source code to get keys from a hash collection is given below. The given program is compiled and executed on Windows 10 Operating System successfully.

# Ruby program to get keys 
# from a hash collection

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

puts "Student ids: ",students.keys();

Output:

Student ids: 
101
102
103

Explanation:

In the above program, we created a hash collection to store student information. Here we stored student id, student name using key/value pair in the hash collection. After that, we got keys from the hash collection using the keys() method and printed them.