Calculator

A working pocket calculator: a right-aligned display driven by a grid of push buttons. Click the keys — or Tab to a key and press Space / Enter — and the display updates. C clears, ± negates, % takes a percentage.

It is deliberately small: a Text bound to a signal for the display, a Button with an onClick per key, and absolute at() placement for the grid — no windowing, no app wiring. A good look at the everyday building blocks before you reach for anything larger.

A working pocket calculator — a signal-bound display driven by a grid of push buttons.