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Answers and rating deltas for

What's wrong with my code ? Why it is not calculating the area of circle correctly?

Author Votes Δ
Ashish Raj 2 +3.92
CC RAT 1 +1.25
user2862544 0 -1.10
MrMikimn -1 -4.08
Last visited: Nov 12, 2017, 2:30:25 PM