Comment (computer programming)
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The exclamation point (!) may be used to mark comments in a Cisco router's configuration mode, however such comments are not saved to non-volatile memory (which contains the startup-config), nor are they displayed by the "show run" command.cite-ref-52[52]cite-ref-53[53]
It is possible to insert human-readable content that is actually part of the configuration, and may be saved to the NVRAM startup-config via:
• The "description" command, used to add a description to the configuration of an interface or of a BGP neighbor
• The "name" parameter, to add a remark to a static route
• The "remark" command in access lists
! Paste the text below to reroute traffic manually
config t
int gi0/2
no shut
ip route 0.0.0.0 0.0.0.0 gi0/2 name ISP2
no ip route 0.0.0.0 0.0.0.0 gi0/1 name ISP1
int gi0/1
shut
exit
Fortran
The following fixed-form Fortran code fragment shows that comment syntax is column-oriented. A letter C in the first column causes the entire line to be treated as a comment. In Fortran 77, an asterisk in column 1 also indicates a comment.
C
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