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RULES TO DRAW FLOWCHART
You must follow these basic rules while drawing a flowchart:
The flowchart should be clear, neat and easy to follow.
Maintain the direction of the flow from left to right or from top to bottom.
Only one flow line should come out of a process symbol.
Ensure that only one flow line should enter a decision symbol, but two flow lines should leave the
decision box.
Ensure that the flowchart has a logical start and end.
ADVANTAGES OF A FLOWCHART
Flowcharts provide the following advantages:
Programmers can analyse the problem in detail.
Programmers can easily understand the logic.
Ideas and solutions can be communicated easily and clearly.
Once the flowchart is prepared, the coding becomes easy for the programmer.
DRAWING A FLOWCHART
Let us now learn how to draw a flowchart.
MAKING A CUP OF TEA CALCULATING THE AREA OF A CIRCLE
Start Start
Read Kettle, Teabags, Read r (radius)
water, milk, sugar and cup
Boil the water in the kettle Calculate
Area = 3.14 × r × r
Pour the boiling water into the cup
Print Area
Add milk, sugar and put a
teabag in the cup
Stop
Stir the tea
Tea is ready
Stop
Algorithm & Flowchart 67

