Any line of input to BD which is terminated by linefeed/carriage return, and which has an ampersand character, & as its last non-space character means that the line is to continue to be read from the next line of input. If you are in interactive mode, you will receive a prompt, BD&, for the continuation. This continuation marker takes precedence over any parsing of the line, and is removed before parsing. Line continuations are allowed when inputting a string, a function, or a constant interactively. However, the possible length of a [B/D] command line is set at a maximum of 253 irrespective of whether or not the line is constructed from several physical lines.