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Input Process Output

1. Input Process Output. Programming Right from the Start with Visual Basic .NET 1/e. Objectives. Distinguish between logic and syntax Understand and use the input statement Understand and use the assignment statement Understand and use the output statement. Objectives (cont.).

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Input Process Output

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  1. 1 InputProcessOutput Programming Right from the Start with Visual Basic .NET 1/e

  2. Objectives • Distinguish between logic and syntax • Understand and use the input statement • Understand and use the assignment statement • Understand and use the output statement

  3. Objectives (cont.) • Understand and use arithmetic operators with precedence • Successfully write program solutions that require input, processing, and output

  4. 1-1 Logic and Syntax • A computer program is a solution to a problem. • An algorithm is the logical design used to accomplish a specific objective. • The Visual Logic DevelopmentSystem combines the utility of flowcharts and pseudocode with computer simulation.

  5. 1-1 Logic and Syntax (cont.) • Syntax refers to the specific rules of a programming language. • An information system is a combination of people and technology that collect, organize, and process data to produce information.

  6. 1-1 Logic and Syntax (cont.) • An information system must do at least three things: • input data into the system • process data within the system • output resulting information from the system

  7. 1-2 “Hello World”

  8. 1-2 “Hello World” (cont.)

  9. 1-2 “Hello World” (cont.)

  10. 1-3 Input Statements • An input statement accepts data from the user and stores that data into a variable. • A variable is a storage location that can be accessed and changed by developer code.

  11. 1-3 Input Statements (cont.)

  12. 1-3 Input Statements (cont.)

  13. Simple Programming Formats

  14. The weekly paycheck program has two input variables: Hours and Rate 1-4 Weekly Paycheck Program

  15. The assignment statement can be used to perform a calculation and store the result. An expression is a value-returning code element, such as a variable or mathematical formula. 1-5 Assignment Statements

  16. How to WriteArithmetic Expressions

  17. How to WriteArithmetic Expressions (cont.)

  18. 1-6 Output Statements • Types of output include • Screen output • Printed output • Sound output • Saving to storage devices

  19. 1-6 Output Statements (cont.)

  20. 1-6 Output Statements (cont.)

  21. Intrinsic Functions • Intrinsic functions are predefined commands that provide developers with common, helpful functionality.

  22. Intrinsic Functions (cont.)

  23. 1-7 Debugging withVisual Logic • A programming mistake is often called a bug.

  24. Chapter Summary • Variables are storage locations used for holding input and processing information. • Each variable has two components: its name and its value. • Input statements are used to get data into variables. • Expressions are value-returning code elements.

  25. Chapter Summary (cont.) • Assignment statements are used to perform calculations and store the result. • Output statements are used to display information. • Input, assignment, and output statements are sufficient to write small programs.

  26. 1 InputProcessOutput Programming Right from the Start with Visual Basic .NET 1/e

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