TI Basic function, accessed from the Catalog:
Usage: DelVar (any user variable, system variables are illegal). For example,
Unofficial usage (not shown in TI manual):
DelVar is the only function that does not have to have a colon or newline after it, therefore "DelVar Str1DelVar Str2DelVar Str3" is legal and will delete strings 1-3. DelVar can be followed with any command, for example "DelVar ADisp A" will always display 0.