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Chapter 2 Notes: 2.1: Concept: programs must be carefully designed before they are written. During the design process, programmers use tools such as pseudo code and flowcharts to create models of programs.

Key terms: Logic Error: A mistake that does not prevent the programming from running, but it causes incorrect results. Debugging: finding and correcting the code that caused the error. Program Development Cycle: the process of creating, debugging, and possibly changing the original program. The steps are as follows:

Design the program write the code correct syntax errors test the executable code Debug the code Repeat necessary Customer: The person, group or organization that is asking you to write a program Software Requirement: A single function that the program must perform in order to satisfy the customer Algorithm: A set of well-defined logical steps that must be taken to perform a task. It must be translated into code before it can be given to the computer. Pseudo code: “Fake Code” used to model programs Flow charts: Diagrams that that graphically depicts the steps the steps that take place in a program. There are three types of symbols in a flow chart:

1. Ovals (Appear at the top and bottom of a flow chart, and are also referred to as terminal symbols. The start terminal symbol marks the program’s starting point and the end terminal symbols marks the program’s ending point)
2. Parallelogram (Used for both input and output symbols)
3. Rectangles (Also called Processing Symbols)

Designing a program: The process of designing a program can be summarized in 2 steps:
1. Understand the task that the program is to perform.
2. Determine the steps that must be taken to perform the task
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2.2: Concept: Output data that is generated and displayed by the program. Input is data that the program receives. When a program

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