Frequent question: Why do we use comments in Ruby?

Comments in your Ruby code are notes and annotations meant to be read by other programmers. The comments themselves are ignored by the Ruby interpreter, so the text inside the comments isn’t subject to any restrictions.

What is the purpose of using comments?

In computer programming, a comment is a programmer-readable explanation or annotation in the source code of a computer program. They are added with the purpose of making the source code easier for humans to understand, and are generally ignored by compilers and interpreters.

What is comment in Ruby?

Comments are lines of annotation within Ruby code that are ignored at runtime. A single line comment starts with # character and they extend from # to the end of the line as follows − #!/usr/bin/ruby -w # This is a single line comment. puts “Hello, Ruby!”

Why is comment important in programming?

Commenting involves placing Human Readable Descriptions inside of computer programs detailing what the Code is doing. Proper use of commenting can make code maintenance much easier, as well as helping make finding bugs faster. Further, commenting is very important when writing functions that other people will use.

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What is the purpose of adding a comment in the program What are the two ways used to add the comments in Python?

In Python, there are two ways to annotate your code. The first is to include comments that detail or indicate what a section of code – or snippet – does. The second makes use of multi-line comments or paragraphs that serve as documentation for others reading your code.

How do you comment out a line in Ruby?

Comments in Ruby begin with a hash mark ( # ) and continue to the end of the line, like this:

  1. # This is a comment in Ruby. …
  2. # Display a prompt to the user puts “Please enter your name.” # Save the input they type and remove the last character (the enter keypress) name = gets.

How do I comment in HTML ERB?

<%# %> is an ERB comment: the dangling = makes no difference, and can be left in. This is what I use to comment out ERB.

How do you comment on ERB?

erb is by definition “embedded ruby”, you can embed every ruby code between: <%= and the other: %> , typically all written in one line. In addition, ruby one-line comments start always with # , so the <%=# Comment %> style matches perfectly with both pure-ruby and erb styles for one-line comments.

What do you understand by comment?

1 : an expression of opinion either in speech or writing The most frequent comment was that service was slow. 2 : mention of something that deserves notice I’d like to make a few general comments before we begin class.

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Which of the following best describes the main purpose of comments?

Which of the following best describes the main purpose of comments? Comments describe your program so other people can read it more easily.

When should you comment code?

A handy rule of thumb is: a comment should only be added to answer a question that the code can’t. If you aren’t confused by what a piece of code is doing, but rather why it’s doing it at that moment, then a comment should be added.