Tool Command Language - lecture 7 - Functions

The syntax of function or procedure in tcl is as

                
proc function_name { arguments } {

             body 

             return 

    } 

    Example
 proc add { a b } {

 return [expr $a + $b ]

  }

 set c [add 3 2 ]

 out put  5

 Here we have declared a function or most appropriate a  procedure  named as add, with arguments as a,b. Later we set a variable c and  we call the above function with two arguments. In return we obtain  sum of  these two arguments and that is assigned to c .