2560340
Description
Mind Map by Saji McCorkindale, updated more than 1 year ago
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Created by Saji McCorkindale
over 9 years ago
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Data Types and Structures
- Introduction
- Programs need to be able to store
data such as texts, whole numbers,
decimal numbers, etc
- Data types such as integers and strings
are used to store these peices of text,
numbers, etc
- Each data type is stored in
the computer's main
memory
- Data types also restrict the actions that can be carried
out on them. This helps reduce human mistakes such as
trying to multiply two letters together.
- Programs need to be able to store
data such as texts, whole numbers,
decimal numbers, etc
- Strings
- Strings are used to store text and sequences of
characters
- Eg "Hamster", "Rasperry Fudge Cakes"
- Strings are used to store text and sequences of
characters
- Integer
- Integers are used to store positive and negative
whole numbers, as well as the number zero
- Eg 42, 0, -100, 64
- Integers are used to store positive and negative
whole numbers, as well as the number zero
- Real
- Real data tyoes are used to store positive and negative
decimal numbers or fractions.
- Eg 0.5, 1.236, -5.6
- Real data tyoes are used to store positive and negative
decimal numbers or fractions.
- Boolean Variables
- Booleans are used to store only two values: True or False
- Eg True, or False
- Booleans are used to store only two values: True or False
- One Dimensional (1-D) Arrays
- Many programs requie data to be stored and
manipulated not as a single itme but as a list of
related data entries.
- An array is used to store a collection of data
where the data is all the same data type
- Each Element in the array is identified by using an array name and
an index number which corresponds to the datas location in the
array
- When an array is created it's length is declared
- Many programs requie data to be stored and
manipulated not as a single itme but as a list of
related data entries.
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