Data Types And Casting Aqa

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Exam code:8525

Data Types & Casting

A data type is a classification of data into groups according to the kind of data they represent
Computers use different data types to represent different types of data in a program
The basic data types include:

Data type	Used for	Example
Integer	Whole numbers	10, -5, 0
Real	Numbers with a fractional part	3.14, -2.5, 0.0
Character	Single character	‘a’, ‘B’, ‘6’, ‘£’
String	Sequence of characters	“Hello world”, “ABC”, “@#!%”
Boolean	True or false values	True, False

It is important to choose the correct data type for a given situation to ensure accuracy and efficiency in the program
Data types can be changed within a program, this is called casting or String handling operations
You can read more about string handling operations and converting data types here

Customers booking a holiday can choose between half board or all inclusive and a hotel star rating between 1 and 5

A typical booking record is shown in the table:

State the most appropriate data type for the following fields [2]:

Give the name of one field that could be stored as a Boolean data type [1]

Answer