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Flowcharts

Algorithm & Flowchart to find the Area of a Circle

Overview

In this tutorial, we will learn how to write and develop an algorithm and flowchart to find the area of a circle of radius r. The problem to solve is to find the area of the circle.

The mathematical formula for the area = pi*r*r

Algorithm

 Let’s analyze the inputs and the expected outputs of the program.

Input: Radius r of the Circle.

Output: Area of the Circle

Step 1: Start

Step 2: Read the radius r of the circle

Step 3: Compute the Area as per the formula.  PI*r*r

Step 4: Print the area of the circle

Step 5: Stop

Pseudocode

START
DECLARE Real r
DECLARE Real area

OUTPUT “Enter the circle radius=”
INPUT r
ASSIGN area = PI*r*r
OUTPUT “Area of the circle with radius ” & r & ” = ” & area
END

Flowchart

Area of Circle Flowchart

Sample Run

Execute the flowchart and verify the output of the flowchart.

Sample Flowchart Run Area of Circle

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