# Solution Exercise 10: algorithm python that compute the area and perimeter of circle

Mar 3, 2023

#### Exercise 10

Write a Python algorithm that prompts the user to enter the radius of a circle and calculates its area and perimeter, and then displays the results.

#### Solution

```import math

# Prompt the user to enter the radius of the circle

# Calculate the area and perimeter of the circle
area = math.pi * radius ** 2
perimeter = 2 * math.pi * radius

# Display the results
print(f"The area of the circle is {area:.2f}")
print(f"The perimeter of the circle is {perimeter:.2f}")```

Explanation:

1. We first import the math module: to use its pi constant.
2. Then we prompt the user to enter the radius of the circle: and store it in the radius variable.
3. We then use the radius: to calculate the area and perimeter of the circle using the formulas pi*r2 and 2*pi*r, respectively.
4. Finally: we display the results using the print function, with the .2f format specifier to round the results to two decimal places.

Younes Derfoufi
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