find the area of a circle in ruby

To find the area of a circle in Ruby, you can use the following formula:

main.rb
area = Math::PI * radius**2
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Where Math::PI is a constant in Ruby that represents the value of pi, and radius is the radius of the circle.

Here's an example code snippet that demonstrates how to find the area of a circle with a radius of 5:

main.rb
radius = 5
area = Math::PI * radius**2
puts "The area of a circle with radius #{radius} is #{area}"
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Output:

main.rb
The area of a circle with radius 5 is 78.53981633974483
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