Forum Discussion
Robert_47833
Altostratus
Altostratusone question in variable
in the syntax ,we normally use :
if { $cjj == 1} {
xxxx
}
I have a question here
sometimes I forget to define this variable cjj,is there any method I can use to...
hooleylist
Cirrostratus
CirrostratusOr you can use [info exists variable]:
if { [info exists cjj] and $cjj == 1} {
xxxx
}
http://www.tcl.tk/man/tcl8.4/TclCmd/info.htm
Aaron