Reactive Programming (or RP for short) is a programming paradigm that gets thrown around a lot, but its clear that there is much confusion about what it actually is. RP is a general programming paradigm, but is particularly suited to creating reactive user interfaces.
The simplest analogy to understand RP is that of a ‘spreadsheet’ — if you’ve ever dabbled with Excel/Google Spreadsheet formulas, congratulations, you’ve done some reactive programming already!