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3.Data Types - Data Types and Identifiers Topics to cover...

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Data Types and Identifiers
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Topics to cover here: The notion of Abstraction Data types Identifiers
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Abstraction An abstraction is a model or simplification of a physical object or concept. We use abstraction in problem solving and programming. Abstraction is an important concept in programming.
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The programs we write present an abstract view of: Problem domain elements (e.g. students, money) Their attributes (e.g. names, ages, stages, dollars) Operations (e.g. modify student’s stage, update money) that can be performed on data. This is called data abstraction .
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Data Types A data type provides a method of modeling or representing a particular set of values and determines what operations can be performed on those values. Representing a particular value in memory is determined by the data type of that value. Most programming languages provide predefined data types (also known as language-defined types ).
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Data Types in The Algorithmic Language
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