What command is used to delete a variable in Bash?

The command used to delete a variable in Bash is unset. When you use this command, it removes the specified variable from the environment, making it as if the variable had never been set. This is particularly useful for managing variable scope and freeing up memory in scripts.

For instance, if you have a variable called myVar, you can use the command unset myVar to effectively delete it. After this operation, if you attempt to reference myVar, it will return an empty value or an error indicating that the variable does not exist.

In contrast, the other options do not fulfill this function. The terms "remove," "delete," and "clear" do not correspond to any built-in commands in Bash for the purpose of removing variables. While "clear" is a command used to clear the terminal screen, it has no impact on variable management. Similarly, "remove" and "delete" do not exist as standalone commands for variable deletion in the Bash shell. Thus, unset is the appropriate command for this task.