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
flowchart.
• MasterConsole is used for the flowchart standard output.
The output flowchart symbol writes the output to the

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.

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.

18. 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.

19. 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.

20. 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.

21. Declare Variables

22. Assign values
name <- “Emma”

23. 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:

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

26. Selection Control

29. Repetitive / Loop Structure