Determines whether control characters (that is, those in the ranges X'0' to X'1F' and X'80' to X'9F') are accepted in INPUT or INPUT@ statements.
INPUT CTRL [ON | OFF | expression]
ON Specifies that control characters should be accepted (default).
OFF Specifies that control characters should be removed.
expression Any expression that evaluates to true or false (see Logical Expressions). If true, control characters are accepted; otherwise, control characters are removed.