This demonstrates the use of the declare command to define an integer variable in Bash.

This demonstrates setting an environment variable for a single command execution without altering the shell environment.

This demonstrates declaring a read-only variable in Bash.

This demonstrates accessing the exit status of the nth command in a pipeline using the special variable ${PIPESTATUS[n]}.

This demonstrates declaring a variable as an integer type and incrementing its value by 1 in Bash.

This demonstrates how to unset (delete) a variable in Bash.

This demonstrates printing the current Bash process ID using the $BASHPID variable.

This demonstrates how to prompt the user for input, read it, and use the input in a script.

This demonstrates variable indirection in Bash to access the value of a variable through another variable.

This demonstrates capturing a single keystroke from the user without requiring them to press Enter.

This demonstrates printing the current working directory using the $PWD built-in variable.

This demonstrates reading user input in a Bash script and echoing it back.

This demonstrates assignment a value from standard input.

This demonstrates setting an environment variable using the export command.

This demonstrates capturing user input from standard input and storing it in a variable.

This demonstrates indirect variable expansion in Bash, where the value of a variable is used to access another variable's value dynamically.

This demonstrates printing the current Bash version using the built-in variable $BASH_VERSION.

This demonstrates exporting a variable to make it globally accessible to child processes in a Bash session.