Tool command Language - Lecture 3 ( Operators )

Operators in tcl are same as in other languages like c, c++.

Tcl supports following operators. 

        

  Arithmetic Operators (+, - , *, /,%)

 Relational Operators(==, !=, < , > , >=)

 Bitwise Operators(&,|,^)

 Ternary Operators(?:)

 Logical Operators(&&, || , !)

Here if we have two variables say x and y

   we write in tcl command prompt 

       set x 10

       set y 12

 puts c [expr $x +$y] will print c as 22. 

similarly  we can use relational operators in following manner

                while{$x < 13 } {  

                  incr x  

                  puts $ y

              }

   

  #Remember syntax.

For Ternary operator we have like c as 

      expression 1 ? expression 2 : expression 3.

if after evaluating  expression 1 , it is true then expression 2 will be evaluated. example

  set x 3

set y [expr ($x>4)?"x is greater than 4":"x is less than 4"]

will print " x is less than 4"