Math interpreter for RPN mathematical notation (revers polish notation) written in java. Commands examples in console: d = 4 6 + 2 * #20, d is 20 c #variable not defined c = 4 1 - #3, c is 3 c = 4 - #error c #3, c is 3 c = 24 #24 c is 24 e = 0 #0, e is 0 c = e 3 + d 2 * + 5 + c - # c d c e + + 215 addddd = 215 #-means comments in this interpreter and after comments predicted value of operation