INCLAN: echo

The echo variable determines which commands are echoed, i.e. copied to standard output before execution. The possible settings are:

off

Commands are not echoed.

NULL

(or not set at all) In macros, all commands except those built into the command line interpreter are echoed; interactive commands are not echoed.

on

Commands that are not built into the command interpreter are echoed regardless of whether they occur in macros or interactively.

large

Same as on, except that the echo is surrounded by blank lines.

full

All commands are echoed, and the corresponding line numbers in macros are given.

Labels are not included in the echo, but variable substitutions are. Statements preceded by "@" are only echoed if echo has the value full.