clear

Scilab Function
Last update : April 1993

clear - kills variables

### Calling Sequence

  `clear a`

### Description

This command kills variables which are not protected. It removes the named variables from the environment. By itself `clear` kills all the variables except the variables protected by `predef` . Thus the two commands `predef(0)` and `clear` remove all the variables.

Normally, protected variables are standard libraries and variables with the percent prefix.

Note the particular syntax `clear a` and not `clear(a)` . Note also that `a=[]` does not kill `a` but sets `a` to an empty matrix.

### See Also

`predef` , `who` ,