INCLAN: echo: Difference between revisions

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Revision as of 15:31, 11 August 2009

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.

@@ Line 5: / Line 5: @@
 :; 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.
+:;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.
+:;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.
+:;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'''.