INCLAN: echo: Difference between revisions

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Revision as of 16:32, 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 3: / Line 3: @@
 The possible settings are:
-:; off: Commands are not echoed.
+; 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.
+;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'''.