Two Stars is an institutional brand for the ExC01's developer.

ExC01 was programmed only with software tools provided by Apple Inc.: Xcode IDE, Swift and SwiftUI. ExC is the contraction of Expression Calculator and 01 its model number. Its best characteristic is the input line allowance for simple mathematical calculation expressions, in the format of [LeftMember][Operator][RightMember], as for example 2^3. After entering an expression as such in the input line and clicking/tapping the ExC button/area, the result will appear below the ExC button/area. The result numbers will be exhibited in the format adopted for exhibition by the language framework.

Besides providing the result on a separated from the input line area which upon clicking/tapping copies the result to the input line for further use, there are two additional memory features: HISTORY and DECOMP EXPRESION.

clicking/tapping the HISTORY button/area will show a list of calculations results.

clicking/tapping the DECOMP EXPRESSION button/area will show a decomposed view of the last successfuly executed calculation.

Both HISTORY and DECOMP EXPRESSION contents may be copied to the input line upon clicking/tapping.

Besides the ExC button/area, the other keys are:

the numerical characters [0 : zero],[1 : one],[2 : two],[3 : three],[4 : four],[5 : five],[6 : six],[7 : seven],[8 : eight],[9 : nine], and [. : point].

the operators [+ : addition] [- : subtraction] [* : multiplication] [/ : division] [^ : exponentiation]

the command keys [C : clear] one position to the left in the input line, [CA : clear all] the input line.

The [-] is allowed for negative numbers input. After using the calculator for some time, the user will get acquainted with a very few further details that are too long and complex to be explained in written, but simple to be understood at use time.

Disclaimer: The developer of ExC01 calculator takes no responsability for and assumes no liability provenient of its use by any person/user. Right's Reserve: The developer of ExC01 calculator software may alter and/or remove it from the Apple Store at any time without any type of notice to any person/user.

In case of doubt or for development of other more specific types of calculators, contact:

Developer: Jose Assumpcao

piacenzaassumpcao777@gmail.com

celular: 1-869-7600065