Remove variable or function names

      unset [-fv] [name]

      -f    The names refer to shell Functions, 
            and the function definition is removed.
            Readonly variables and functions can not be unset. 

      -v    Each name refers to a shell Variable (default)

The return status is zero unless a name does not exist or is readonly.

This is a BASH shell builtin, to display your local syntax from the bash prompt type: help unset

“A good trader has to have three things: a chronic inability to accept things at face value, to feel continuously unsettled, and to have humility” ~ Michael Steinhardt

Related linux commands:

env – Display, set, or remove environment variables
echo – Display message on screen
export – Set an environment variable
function – Define Function Macros
readonly – Mark variables/functions as readonly
set – Manipulate shell variables and functions
Equivalent Windows commands: SET – Display, set, or remove Windows environment variables

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