# Shell Script Calulate Area and Circumference of Circle

A circle is one of the simple shapes of Euclidean geometry. It is the locus of all points in a plane at a constant distance, called the radius, from a fixed point, called the center. Through any three points not on the same line, there passes one and only one circle.

A diameter is a chord passing through the center. The length of a diameter is twice the radius. A diameter is the largest chord in a circle.

Circles are simple closed curves which divide the plane into an interior and an exterior. The circumference of a circle is the perimeter of the circle, and the interior of the circle is called a disk.

## Sample Shell Script To Calculate Area and Circumference of Circle

`#!/bin/bash# Shell script to calulate area and Circumference of circle. # It take radius of a circle as input.# -------------------------------------------------------------------------# Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/># This script is licensed under GNU GPL version 2.0 or above# -------------------------------------------------------------------------# This script is part of nixCraft shell script collection (NSSC)# Visit http://bash.cyberciti.biz/ for more information.# ----------------------------------------------------------------------# Lesson on Circumference of a Circle : #  Visit http://www.mathgoodies.com/lessons/vol2/circumference.htmlecho -n "Enter the radius of a circle : "read r # use formula to get itarea=\$(echo "scale=2;3.14 * (\$r * \$r)" | bc) # use formula to get itd=\$(echo "scale=2;2 * \$r"|bc)circumference=\$(echo "scale=2;3.14 * \$d"| bc) echo "Area of circle is \$area"echo "Circumference of circle is \$circumference"`

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• vishnu

thank for script

• http://www.yahoo.com Sivaranjan

s there only one data structure in linux…? we cant get the floating point values, like \$ for int s ther any for decimal points…?

• http://http.www.com prescia

Nice explanation and impressive….