Interactive Number Base Conversion Across Radices

This GeoGebra example demonstrates how to convert a number between common number systems by interactively inputting a digit (or digit sequence) and a source/target base, while clearly separating the handling of the integer and fractional parts. The key mathematical ideas include radix/base representation, positional numeral systems, dividing the value into integer and fraction components, and using arithmetic (division/iterative digit extraction) to rebuild the representation in another base. In the construction, user parameters are collected with Textfield and multiple InputBox objects (e.g., inputs a,b,c,d, and the target base base). The conversion logic is organized with objects like eq/return/conv, while con2base handles conversion to the chosen base and frac/frac2b manage fractional-part processing. Intermediate results such as fraction-related objects (frac, fraction, fracbase, fracradix, rfraction) and stepwise quantities (e.g., fracDelta) track the contribution of fractional digits under different place values. Suitable for upper secondary through early university courses on number systems, discrete math, and computational thinking via interactive visualization.