Shell script to find area of a circle?

Answer 1

To write a shell script to find the area of a circle, you can use the formula: area = π * radius^2. Here is an example shell script using the read command to input the radius from the user:

#!/bin/bash
echo "Enter the radius of the circle:"
read radius
area=$(echo "3.14159 * $radius * $radius" | bc)
echo "The area of the circle with radius $radius is $area"

This script first prompts the user to enter the radius, calculates the area using the formula, and then displays the result.

Answer 2

echo -n "Enter the radius of a circle : "

read r

# use formula to get it

area=$(echo "scale=2;3.14 * ($r * $r)" | bc)

# use formula to get it

d=$(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"