02 | Core Programming Gerry O’Brien | Technical Content Development Manager Paul Pardi | Senior Content Publishing Manager

How Computers Store and Manipulate Information Data Structures Algorithms Decision Making Repetition Program Errors Module Overview

Computer Storage and Processing

Variables, Constants, and Data Types Variable – provides a temporary, named storage location in computer memory Constant – either a named storage location or literal value. Cannot be changed during program execution Data Types – numeric, character, special Data TypeRangeDescription byte0 to 255A single byte (8 bits) charAny Unicode characterCharacters used in most languages in the world short-32,768 to 32,767Signed integer values int-2,147,483,648 to 2,147,483,647Larger signed integer values long9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 Even larger signed integer values float +/- 1.5 x to +/- 3.4 x10 38 Floating point signed values Double+/- 5.0e -324 to +/- 1.7e308Large floating point signed values StringString of charactersWords, sentences, phrases, etc. BooleanTrue or FalseUsed to represent true or false, 1 or 0

Data Structures Arrays Stacks Queues Dictionaries

Arrays A collection of similar data types accessed by index IndexValue 0Item1 1Item2 2Item3 3Item4 4Item5 5Item6 6Item7 7Item8 8Item9 9Item10

Stack A collection of objects, accessed by pop and push

Queue A collection of objects, accessed by queuing and dequeuing. Similar to a line at the motor vehicle license branch EnqueueDequeue

Dictionary A collection of objects that are accessed by using a key KeyValue Key1First Item Key2Second Item Key3Third Item Key4Fourth Item Key5Fifth Item

Demo Data Structures

Algorithms

Decision Making if, if-else, if-else-if switch or Select Case

Demo Decision Structures

Repetition for loops while loops do-while loops recursion

Demo Repetition

Program Errors Syntax errors Logic errors Exceptions Structured Exception Handling Using the debugger

Demo Errors and Debugging

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