Ruby Comments

In Ruby, comments are used to add additional notes to code or to temporarily disable code. They are ignored by the interpreter, so they do not affect the output of the program.

Syntax

Single line comments

Single-line comments start with a pound sign (#) and continue until the end of the line:

# This is a single line comment

Multi-line comments

Multi-line comments start with =begin and end with =end. All text between these two keywords is treated as a comment:

=begin
This is a multi-line comment.
It can span across multiple lines.
=end

Example

Here is an example of how to use comments in Ruby:

# This program calculates the sum of two numbers

# Read the first number from the user
puts "Enter the first number:"
number1 = gets.to_i

# Read the second number from the user
puts "Enter the second number:"
number2 = gets.to_i

# Calculate the sum of the two numbers
sum = number1 + number2

# Display the result to the user
puts "The sum of the two numbers is #{sum}."

# =begin
This is a multi-line comment.
It can span across multiple lines.
=end

Output

When the above program is executed, it will ask the user to enter two numbers, calculate the sum of the two numbers and then display the result:

Enter the first number:
5
Enter the second number:
10
The sum of the two numbers is 15.

Explanation

In the above example, we used comments to add additional notes to the code. We added comments to indicate what the program does, as well as what each line of code does.

We also used a multi-line comment to temporarily disable a block of code.

Add comments in your code to make it more readable and understandable for yourself and other developers who may work with your code in the future.

Use

Comments are an essential part of programming. They help explain what the code does and make it easier to understand. Here are some situations where comments can be useful:

• To explain a complicated piece of code
• To provide context for a block of code
• To temporarily disable code
• To document the code for other developers

Important Points

• Single-line comments start with a pound sign (#) and continue until the end of the line
• Multi-line comments start with =begin and end with =end
• Comments are ignored by the interpreter
• Use comments to make your code more readable and understandable

Summary

In Ruby, comments are used to add notes to code or to temporarily disable code. They can be single-line or multi-line and are ignored by the interpreter. Use comments to make your code more readable and understandable.