Area of Circle
Python
Easy
2 views
Problem Description
Radius r is provided. Make function area(r)=pi*r*r and output with 2 decimals. Use pi=3.141592653589793.
Input Format
One number r.
Output Format
One number area.
Official Solution
import sys
s=sys.stdin.read().strip()
if not s: sys.exit(0)
r=float(s)
pi=3.141592653589793
def area(x):
return pi*x*x
sys.stdout.write(f'{area(r):.2f}')
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