7-segment display

A 7-segment display is a special type of electronic clock or calculator that shows numbers in a certain way. It contains 7 small lights, called segments, that are arranged in the shape of a rectangle or square. Each segment can be either "on" or "off".

The segments are named like this: A, B, C, D, E, F and G. They are numbered in clockwise direction. Think of it as if you are looking at a clock face from above: A is the top segment, B is top right, C is bottom right, D is bottom, E is bottom left, F is top left, and G is the center segment.

To make the display show a certain number, you need to turn on some of these segments while leaving others off. For example, to make it show the number "0", you need to turn on segments A, B, C, D, E, F and turn off segment G. To show the number "3", you need to turn on segments A, B, C, D, and G, and turn off segments E and F.

These displays are helpful because they're easy to read and understand. They're often used in different electronic devices that require numerical presentation, like digital clocks or calculators, and can even be used in signs or banners for public display.