Ruby - Print Hello World

1. Introduction

The "Hello World" program is the most basic and the first program that most programmers write in any new programming language they are learning. It serves as a simple test to ensure that the language's environment and syntax are correctly understood and working. In this post, we will walk through creating a "Hello World" program in Ruby.

2. Program Steps

1. Start by opening your Ruby environment or editor.

2. Declare the main method.

3. Use the puts method inside the main method to print "Hello World".

4. Call the main method to execute the program.

3. Code Program

# This is our main method
def main
  # Using puts to print Hello World to the console
  puts "Hello World"
end
# Calling the main method to run our program
main

Output:

Hello World

4. Step By Step Explanation

1. Here, we are declaring a method named main. It's common in many programming languages to have a main method as the program's entry point. However, in Ruby, it's not mandatory. We're using it for clarity.

2. The puts method is used to print something to the console in Ruby. In this case, it prints the string "Hello World".

3. Finally, we call the main method. When Ruby reads this, it will execute the main method and run the code inside it.


Related Ruby Examples:

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Ruby Tutorials

Ruby Hash Tutorial Ruby String Tutorial Ruby Array Tutorial Ruby - Match a Pattern in a String Ruby - map Function Example Ruby - reduce Function Example Ruby - select Function Example Ruby - Date and Time Example Ruby - Create and Execute a Basic Thread Ruby - Main Thread and Sub-threads Ruby - Pause Execution of Thread Using sleep Ruby - Terminate a Thread Using Thread.kill Ruby - Check Status of a Thread Using alive? Ruby - Thread Priority Example Ruby - Use Thread.pass for Thread Scheduling Ruby - Thread Local Variables Ruby Convert String to Hash Ruby Convert String to JSON Ruby Convert String to Integer Ruby Convert String to Array Ruby Convert String to Date Ruby Convert String to CamelCase Ruby Convert String to Boolean Ruby Convert String to Float Ruby Convert String to DateTime Ruby Convert Number to String Ruby Convert Number to Binary Ruby Convert Number to Boolean Ruby Convert List to Set Ruby Convert List to String Ruby Convert List to Hash Ruby Convert List to Map Ruby Convert Array to List Ruby Convert Array to Hash Ruby Convert Array to Hash With Index as Key Ruby Convert Array to Set Ruby Convert Array to String Comma Separated Ruby Convert Array of Strings to Integers Ruby Convert Array to JSON Ruby Convert Array of Hashes to JSON Ruby Convert Hash to JSON Ruby Convert Hash to String Ruby Convert Hash to Array Convert Hash Keys to Strings Ruby Convert Date to DateTime Ruby Convert Date to Epoch Ruby Convert Date to TimeStamp Ruby Convert Date to Milliseconds

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