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RPN or Algebraic

CustomCalc offers three input modes: Algebraic, RPN, or Algebraic Sequential.

RPN: Using the logic RPN system, CustomCalc is a perfect replacement for HP calculators, with the most sophisticated fuctions easier to use.

Algebraic: Algebraic input mode uses the parenthesis and the equal sign. This input mode differs from the Sequential Algebraic (see next paragraph) in that it considers the operator precedence, thus 2 3 4 will give a result of 14.

Algebraic Sequential: or Sequential Algebraic input mode, is like Alg input mode, but it does not consider the operator precedence, thus 2 3 4 will give a result of 20.