Overview
The selection symbol in the Raptor flowchart is used for decision making. It is a diamond-like structure with two branches. Based on the expression in the diamond box, the control of the program will branch either left or right.
- Left -> (Yes/ True)
- Right -> (No/ False)
How to add Selection Symbol
We can add the selection structure to the flowchart in multiple ways.
Drag and drop the symbol from the Symbols pane to the flowchart workspace.
Right-click on the workspace >> Insert selection
Nested Selection
We can nest many selection symbols when we make multiple decisions in the flowcharts.
Sample Usage
Let’s see a sample usage of the flowchart using the Selection symbol.
Pseudocode
START
DECLARE x,y
PROMPT "Input x"
INPUT x
PROMPT "Input y"
INPUT y
PRINT "x=" + x
PRINT "y=" + y
IF x > y THEN
PRINT x + " > " + y
ELSE
IF x = y THEN
PRINT x + " = " + y
ELSE
PRINT x + " < " + y
END IF
END IF
END
Common mistake
A common mistake when adding a selection structure to flowchart is to miss the selection condition. This would result in Error. We need to add the condition to the flowchart so that the logic would decide which path to take based on the condition.
RAPTOR Tutorial Page: https://www.testingdocs.com/raptor-a-flowchart-tool/
RAPTOR official website: https://raptor.martincarlisle.com/