A Bash Comment Starts With Which Character

Shell Programming

When it comes to writing bash scripts, there are various components to consider, including comments. As a budding programmer, I remember struggling with the syntax of bash comments when I first started diving into shell scripting. So, let’s dive deep into the world of bash comments and explore the character that signifies the beginning of a bash comment.

Understanding Bash Comments

Comments are vital in any programming language as they allow us to annotate our code for future reference and for the benefit of others who may read our scripts. In bash scripting, a comment is a line that is not executed as a part of the script but is included for explanatory purposes. It’s a way to add human-readable information within the script.

So, which character do we use to start a bash comment? The answer is simple: the hash symbol, also known as the pound sign (#). When the bash interpreter encounters the hash symbol, it disregards the rest of the line, considering it as a comment.


# This is a bash comment
echo "Hello, World!"

In the example above, the line starting with the hash symbol is a comment. It’s a way for the scriptwriter to convey information or provide context about the following line of code.

It’s important to note that bash comments are single-line only. Unlike some other programming languages where you can use multi-line comments, bash does not support them. Each line that needs to be commented must have the hash symbol at the beginning of the line.

Personal Experience

When I was learning bash scripting, understanding the nuances of comments was a bit bewildering. I often found myself perplexed by why my comments weren’t working as intended, only to realize that I had missed the hash symbol at the beginning of the line. As with any language, it takes time and practice to internalize the syntax, and bash scripting was no exception. However, once I grasped the concept, it became second nature.


In conclusion, the hash symbol (#) is the character that signifies the beginning of a bash comment. It’s a simple yet indispensable tool for adding clarity and context to our scripts. So, as you embark on your bash scripting journey, remember to use comments liberally to elucidate your code and make it more understandable for yourself and others.