Day: September 13, 2021

Bash Shell in Linux
Bash Shell

Variable and environment variable

Variables are important components of every programming language and are used to hold different data. Scripting languages do not require to declare variable type first. In Bash shell, the value of variable is a string, even if we specify the value of that variable to be enclosed in double quotes or quotes or not. In addition, there are many variables used by the shell environment and the operating system environment to store default values, called environment variables.

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