Ruby Basic Exercises: Compute the parameter and area

Ruby Basic: Exercise-4 with Solution

Write a Ruby program which accept the radius of a circle from the user and compute the parameter and area.

Ruby Code:

radius = 5.0
perimeter = 0.0
area = 0.0
print "Input the radius of the circle: "
radius = gets.to_f
perimeter = 2 * 3.141592653 * radius
area = 3.141592653 * radius * radius
puts "The perimeter is #{perimeter}."
puts "The area is #{area}."

Output:

Input the radius of the circle: The perimeter is 31.41592653.
The area is 78.539816325.

Flowchart:

Ruby Code Editor:

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