6.41. undef Macro
Interface
The general syntax is:
!undef name
The arguments are:
| Name | Type | Default | Rule | 
| name | symbol | 
See Understanding Macro Interfaces, if necessary.
Description
The undef macro undefines a variable.

The general syntax is:
!undef name
The arguments are:
| Name | Type | Default | Rule | 
| name | symbol | 
See Understanding Macro Interfaces, if necessary.
The undef macro undefines a variable.