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Roman Numerals to Integers

Roman Numerals to Integers
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2020-10-04 19:23
Coordinate GeometryGeometric Construction
This example demonstrates how to convert Roman numerals to integers. It involves core math concepts like arithmetic operations and integer representation. Construction highlights the use of GeoGebra commands and objects such as Text, Textfield, and buttons to create an interactive Roman numeral to integer converter. Suitable for middle school and above students learning number representation and basic programming logic.

GeoGebra Commands & Parameters

  1. Text(If[h ≟ 0, "", If[h ≟ 1, "C", If[h ≟ 2, "CC", If[h ≟ 3, "CCC", If[h ≟ 4, "CD", If[h ≟ 5, "D", If[h ≟ 6, "DC", If[h ≟ 7, "DCC", If[h ≟ 8, "DCCC", If[h ≟ 9, "CM", "M"]]]]]]]]]]) → text3
  2. Text(If[t ≟ 0, "", If[t ≟ 1, "X", If[t ≟ 2, "XX", If[t ≟ 3, "XXX", If[t ≟ 4, "XL", If[t ≟ 5, "L", If[t ≟ 6, "LX", If[t ≟ 7, "LXX", If[t ≟ 8, "LXXX", "XC"]]]]]]]]]) → text4
  3. Text(If[v ≟ 0, "", If[v ≟ 1, "I", If[v ≟ 2, "II", If[v ≟ 3, "III", If[v ≟ 4, "IV", If[v ≟ 5, "V", If[v ≟ 6, "VI", If[v ≟ 7, "VII", If[v ≟ 8, "VIII", "IX"]]]]]]]]]) → text5
  4. Textfield(textAns) → InputBox1
  5. Text(text3 + text4 + text5) → text9

AI Drawing Prompt Reference

Create an interactive Roman numeral to integer converter layout. Display three separate text pieces representing the candidates for the hundreds, tens, and ones places: hundreds can be C, CC, CCC, CD, D, DC, DCC, DCCC, CM; tens can be X, XX, XXX, XL, L, LX, LXX, LXXX, XC; ones can be I, II, III, IV, V, VI, VII, VIII, IX. Add a text input box for the user’s answer. Finally, concatenate the hundreds, tens, and ones texts in that order to form a single Roman numeral string for reading.
The prompt above was compiled from the original drawing commands and is for reference only.