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examples/basics/rectangle_solution.py

width = 23
height = 17
area = width * height
print("The area is ", area)    # 391
circumference = 2 * (width + height)
print("The circumference is ", circumference)    # 80

examples/basics/circle_solution.py

r = 7
pi = 3.14
print("The area is ", r * r * pi)           # 153.86
print("The circumference is ", 2 * r * pi)  # 43.96

• The documentation of the math module.

examples/basics/circle_math_solution.py

import math

r = 7
print("The area is ", r * r * math.pi)           # 153.9380400258998
print("The circumference is ", 2 * r * math.pi)  # 43.982297150257104

examples/basics/circle_power_solution.py

r = 7
pi = 3.14
print("The area is ", r ** 2 * pi)           # 153.86
print("The circumference is ", 2 * r * pi)  # 43.96

examples/basics/calc_solution.py

a = 3
b = 2

print(a+b)   # 5
print(a-b)   # 1
print(a*b)   # 6
print(a/b)   # 1.5