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21 lines
613 B
Markdown
21 lines
613 B
Markdown
---
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title: "01-bits-and-bytes"
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aliases:
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tags:
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- cosc204
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- lecture
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---
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# What is data
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- A fact — a piece of information
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- corresponds to discreete facts about phenomena from which we gain information abou the world
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- The concept of a *value* is fundamental to data
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- e.g., 25, $356.00, April, "this is a sentence", colours etc
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- Vaues are abstract, they are interpretations of data
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- There are many way of storing the same data
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- e.g., 12, twelve, XII, 1100, · ··, ·----··---
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# How computers represent data
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- In Binary
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- Stored in one of two states, true/false, 1/0, on/off, voltage/no voltage
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