`unsetenv`

Removes an environment variable from the current process.

Category: Environment and Settings > System Commands

Syntax

unsetenv(name)

Deletes the variable name from the process environment.

Description

After the call isenv(name) is false and getenv(name) returns an empty character vector. Programs started afterwards with system no longer see the variable. Only the current process is changed.

Input arguments

name: Variable name.

Example

Create and remove

setenv('TMP_DEMO', '1');
disp(isenv('TMP_DEMO'))
unsetenv('TMP_DEMO');
disp(isenv('TMP_DEMO'))
disp(isempty(getenv('TMP_DEMO')))

Output

   1
   0
   1

See also

setenv getenv isenv loadenv