This demonstrates the use of associative arrays in Bash by declaring an array and assigning a key-value pair.

This demonstrates capturing the output of a command into a variable.

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

This demonstrates basic arithmetic operations in Bash using the $((...)) syntax.

This demonstrates the use of the shift command to manipulate positional parameters in Bash.

This demonstrates accessing the process ID of the current shell session using the built-in variable $$.

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 code snippet measures the elapsed time of a script using Bash's built-in SECONDS variable, simulating work with sleep 2, and then calculates and displays the execution time.

This demonstrates accessing and printing the current line number in a Bash script using the $LINENO variable.

This demonstrates accessing the count of arguments passed to a Bash script.

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

This demonstrates generating a random number within a specific range using the $RANDOM variable and modulo operation.

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 using the IFS variable to split a comma-separated string and iterate over its elements in a for loop.

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

This demonstrates accessing all command-line arguments in a Bash script.

This demonstrates the use of built-in Bash variables to access script information like return values, process ID, and arguments.

This demonstrates printing the current user's username using the built-in $USER variable.