I am very new for TCL. Just I want to know that how to write TCL procedures without argument and how to call and how to execute it.
Answer
To write a procedure that doesn't take any arguments, do this:
proc someName {} {
# The {} above means a list of zero formal arguments
puts "Hello from inside someName"
}
To call that procedure, just write its name:
someName
If it was returning a value:
proc example2 {} {
return "some arbitrary value"
}
Then you'd do something with that returned value by enclosing the call in square brackets and using that where you want the value used:
set someVariable [example2]
To execute it... depends what you mean. I assume you mean doing so from outside a Tcl program. That's done by making the whole script (e.g., theScript.tcl) define the procedure and do the call, like this:
proc example3 {} {
return "The quick brown fox"
}
puts [example3]
That would then be run something like this:
tclsh8.5 theScript.tcl