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The result, 3, is calculated and displayed immediately.

              RPN is an efficient data entry method that eliminates the need to enter parentheses in expression.

NOTE:   bCalc v1.0.0 only supports postfix notation in RPN mode.

For example

              the (infix notation) expression

(4 + 5) ื 6  could be expressed in postfix notation as

4 [Enter] 5 [Enter] + [Enter] 6 [Enter]    

or   

6 [Enter] 4 [Enter] 5 [Enter] + [Enter]