Raptor tool

Problem Solving using RAPTOR Tool

1. RAPTOR Tool Handled by Dr. T. Abirami Associate Professor Department of Information Technology Kongu Engineering College, Perundurai

2. Raptor Tool Components Workspace Area Menu Toolbar Symbols area Watch Window Master Console

3. Workspace Area The Workspace area is where flowcharts and UML components like classes are built and executed. Initially, this area just contains a Start and End symbols in the main tab.

4. Menu The Raptor menu consists of several choices that lets user to perform several actions. Major actions like opening new file, save the flowcharts to the hard disk , run the flow charts etc.

5. Symbols Area: Symbols area consists of flowchart symbols that are used in building a flowchart. Assignment symbol Input symbol Output symbol Call Selection Loop

6. Watch & Master Console Windows Watch windows is used to trace the variable values, objects in the heap memory etc. Watch window is helpful to debug the flowchart. MasterConsole  is used for the flowchart standard output. The output flowchart symbol writes the output to the MasterConsole window.

7. RAPTOR Symbols Assignment Symbol  -> The assignment symbol is used to give a variable a numeric or string value. Call Symbol  -> The call symbol is used to make calls to outside procedures, such as graphics routines. Input Symbol  -> The input symbol is used for getting input from the user. Output Symbol  -> The output symbol is used to display text to the master Console. Selection Symbol  -> The selection structure is used for decision making. Loop Symbol  -> The loop structure is used for iteration and repetition.

8. Start and End Terminator Symbols The oval symbols are used for Start and End Terminator symbols.

9. Input/Output Symbols A parallelogram is used for input and output data to the flowchart. The Input symbol is used to prompt the user to enter information. The information is stored in variables. The output symbol is used to print the information to the MasterConsole window or to redirect it to a file.

10. Input Symbol

11. Input Symbol

12. Input Symbol

13. Output Symbol

14. Input/Output Symbols

15. The Enter Output dialog prompt to specify the information and variables to output.

16. Assignment Symbol A rectangle is used for the process symbol. The processing statements and calculations can be done in this block.The assignment symbol is used to assign a variable or to change the value of a variable. count <- 1 sum <- a + b The right hand side is evaluated first and then the value is assigned to the left hand side variable.

17. Selection Symbol The diamond structure is the Selection symbol. Selection symbol is used for making decisions in the flowchart. The decision expression is entered in the diamond.

18. Loop Symbol Loop symbol is a repetitive structure in RAPTOR flowchart. The Loop symbol is used to repeat a set of steps in the flowchart until the loop condition is met.

19. Variables in Raptor Flowchart Computer programs store data in memory. A variable is a name that points to the memory location where we store data. The data value stored in the variables has a datatype. In the Raptor flowchart, we have Numbers, Strings and Arrays. i and name are variables that hold Number and String data values respectively.

20. Declare Variables

21. Assign values name <- “Emma”

22. Naming variable names Raptor variables should start with an alphabet letter and can only contain letters, digits, and underscore. It’s recommended to keep the variable names clear, meaningful, and descriptive. Programmers should also stick to a naming convention for naming the variable’s names. Naming convention Example use of underscore employee_name CamelCase EmployeeName SNo Rule Example 1 Variable names cannot start with digits. 7rate 2 Variable names cannot contain illegal characters. Student$Name 3 Variable names cannot empty spaces. interest rate Some invalid variable names are shown below:

23. Save the file flowcharts are stored with the .rap file extension as shown below.

24. Selection Control

25. Repetitive / Loop Structure