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Chapter 8. Manipulating Data

Chapter 8. Manipulating Data

Every day you’re presented with various types of information—the weather, a special on a lunch menu, the past-due amount on your credit card. Some of this information you take as is, and some you manipulate (to make it more understandable or to answer questions). For instance, if you were to receive a past-due notice on your credit card, you might want to use that card’s finance rate to determine how much more money you’ll owe. Taking a piece of data and using it to arrive at another piece of data is known as data manipulation, and it can be as simple as converting a person’s weight from kilograms to pounds or as complicated as translating text from English to Mandarin. Regardless of its complexity, data manipulation is essential to building applications and presenting information in a useful way.

Manipulating data by converting it from one scale of measurement to another is what this temperature converter does, converting Fahrenheit values to Celsius.


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