diff options
Diffstat (limited to 'doc/incr.n')
| -rw-r--r-- | doc/incr.n | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -24,6 +24,12 @@ 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. +.PP +.VS 8.5 +Starting with the Tcl 8.5 release, the variable \fIvarName\fR passed +to \fBincr\fR may be unset, and in that case, it will be set to +the value \fIincrement\fR or to the default increment value of \fB1\fR. +.VE 8.5 .SH EXAMPLES Add one to the contents of the variable \fIx\fR: .CS @@ -42,7 +48,7 @@ variable \fIx\fR: .CE .PP Add nothing at all to the variable \fIx\fR (often useful for checking -whether an argument to a procedure is actually numeric and generating +whether an argument to a procedure is actually integral and generating an error if it is not): .CS \fBincr\fR x 0 |