Ruby program to calculate triangle circumference

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Following program shows you how to calculate triangle circumference.
This program gets triangle sides from user and calculates circumference and prints it using following formula
Circumference = side1 + side2 + side3

 puts "Enter the side1 of triangle:"
 triangleSide1 = gets.to_f
 puts "Enter the side2 of triangle:"
 triangleSide2 = gets.to_f
 puts "Enter the side3 of triangle:"
 triangleSide3 = gets.to_f
 circumferenceOfTriangle = triangleSide1 + triangleSide2 + triangleSide3
 puts "Circumference of triangle is: #{circumferenceOfTriangle}"

Output:

Enter the side1 of triangle:
20
Enter the side2 of triangle:
10
Enter the side3 of triangle:
30
Circumference of triangle is: 60.0
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