AT&T 6300 Programmer's Manual page 327

Syntax
prompt
stringvar
LINE INPUT
Statement
Inputs an entire line (up to 254 characters) to a
string variable, without the use of delimiters.
A LINE INPUT statement is only used in a
program.
LINE INPUT [;] [prompt;] stringvar
is a string constant (enclosed in a pair of quotation marks)
that is displayed on the screen before input is accepted. A
question mark is not displayed unless it is part of the
"prompt" string.
is the name of a string variable to which the line is to be
assigned.
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