Input%20Process%20Output

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

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Objectives

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

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Objectives (cont.)

• Understand and use arithmetic operators with
  precedence
• Successfully write program solutions that require
  input, processing, and output

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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 Development System combines the
  utility of flowcharts and pseudocode with
  computer simulation.

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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.

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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

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1-2 Hello World
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1-2 Hello World (cont.)
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1-2 Hello World (cont.)
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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.

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1-3 Input Statements (cont.)
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1-3 Input Statements (cont.)
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Simple Programming Formats
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1-4 Weekly Paycheck Program

• The weekly paycheck program has two input
  variables
• Hours and Rate

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1-5 Assignment Statements

• 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.

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How to WriteArithmetic Expressions
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How to WriteArithmetic Expressions (cont.)
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1-6 Output Statements

• Types of output include
• Screen output
• Printed output
• Sound output
• Saving to storage devices

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1-6 Output Statements (cont.)
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1-6 Output Statements (cont.)
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Intrinsic Functions

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

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Intrinsic Functions (cont.)
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1-7 Debugging withVisual Logic

• A programming mistake is often called a bug.

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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.

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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.

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InputProcessOutput
1

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