How to define variables in bash?

In Bash, you can define variables by simply assigning a value to a variable name without any spaces around the equal sign (=). Here’s the syntax:

variable_name=value

Example:

1. Defining a String Variable:

greeting="Hello, World!"

2. Defining an Integer Variable:

count=10

3. Defining a Variable with Spaces:

If you want to include spaces in the value, you should enclose the value in quotes:

message="This is a message with spaces."

Accessing Variables:

To access the value of a variable, use the dollar sign ($) before the variable name:

echo $greeting

This will output:

Hello, World!

Note:

• Variable names should not start with a number and can contain letters, numbers, and underscores.
• By convention, variable names are usually written in uppercase letters.