Lesson 0 of 8
Start here
Show on a big screenA word you save must be written down somehow. Written down in what?
This is Data & Patterns II. It uses what you know about bits, records and tables.
What you will learn
- One switch. The smallest thing a machine can write in.
- More switches. Each new switch doubles the patterns. A pattern is one setting of all the switches.
- A code. An agreed table gives patterns a meaning.
- Rows and columns. One record per row, one field per column.
- Sorting and filtering. Change what you see, not what is there.
Need a quick recap?
- What is data? — a fact you collect and keep.
- Kinds of data — numbers, words, pictures, sounds.
- Storage — keeps what you saved, even with the power off.
- A named box — a program can hold one value in it.