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5: Common Data Types

Last updated

May 4, 2025
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- 4.13: Bitwise Operators
- 5.1: Integer Data Type

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5.1: Integer Data Type
The integer data type basically represents whole numbers (no fractional parts). The integer values jump from one value to another. There is nothing between 6 and 7. It could be asked why not make all your numbers floating point which allow for fractional parts.
5.2: Floating-Point Data Type
The floating-point data type is a family of data types that act alike and differ only in the size of their domains (the allowable values). The floating-point family of data types represent number values with fractional parts. They are technically stored as two integer values: a mantissa and an exponent. The floating-point family has the same attributes and acts or behaves similarly in all programming languages.
5.3: String Data Type
Technically, there is no string data type in the C++ programming language. However, the concept of a string data type makes it easy to handle strings of character data. A single character has some limitations. Many data items are not integers or floating-point values.
5.4: Character Data Type
The five arithmetic assignment operators are a form of short hand. Various textbooks call them "compound assignment operators" or "combined assignment operators". Their usage can be explaned in terms of the assignment operator and the arithmetic operators.
5.5: Interger Division and Modulus
By the time we reach adulthood, we normally think of division as resulting in an answer that might have a fractional part (a floating-point data type). This type of division is known as floating-point division.
5.6: Typedef - An Alias
The typedef statement allows the programmer to create an alias, or synonym, for an existing data type. This can be useful in documenting a program.
5.7: Sequence Operator
The sequence (or comma) operator is used to separate items. It has several uses.

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