17. An electronic calculator as in claim 13 wherein said editing keys include a delete control key for selectively deleting one or more characters of a line of one or more alphameric statements, entered into said buffer storage means from said keyboard input means or recalled thereto from said memory means, following actuation of at least one of said forward and backward control keys for single stepping to the one or more characters to be deleted.
18. An electronic calculator as in claim 17 wherein said processing means includes a delete routine responsive to actuation of said delete control key, following actuation of at least one of said foward and backward control keys for single stepping to a particular character of a displayed line of one or more alphameric statements, for deleting that character.