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-rw-r--r--doc/incr.n25
1 files changed, 24 insertions, 1 deletions
diff --git a/doc/incr.n b/doc/incr.n
index 68f3114..6a2ecc3 100644
--- a/doc/incr.n
+++ b/doc/incr.n
@@ -5,7 +5,7 @@
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
-'\" RCS: @(#) $Id: incr.n,v 1.3 2000/09/07 14:27:48 poenitz Exp $
+'\" RCS: @(#) $Id: incr.n,v 1.4 2004/04/30 22:45:56 dkf Exp $
'\"
.so man.macros
.TH incr n "" Tcl "Tcl Built-In Commands"
@@ -26,6 +26,29 @@ integer) is added to the value of variable \fIvarName\fR; otherwise
1 is added to \fIvarName\fR.
The new value is stored as a decimal string in variable \fIvarName\fR
and also returned as result.
+.SH EXAMPLES
+Add one to the contents of the variable \fIx\fR:
+.CS
+incr x
+.CE
+
+Add 42 to the contents of the variable \fIx\fR:
+.CS
+incr x 42
+.CE
+
+Add the contents of the variable \fIy\fR to the contents of the
+variable \fIx\fR:
+.CS
+incr x $y
+.CE
+
+Add nothing at all to the variable \fIx\fR (often useful for checking
+whether an argument to a procedure is actually numeric and generating
+an error if it is not):
+.CS
+incr x 0
+.CE
.SH "SEE ALSO"
expr(n)