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...
Robert_47833Altostratus
Altostratusyes,catch seems a good command ,but another question raise,
if I want to check whether one variable exists catch {command},which command I should use in the curly braces?