Functions

def function_name(parameter1, parameter2, ...):
    Code to run
    return result

Code and Return should be indented.

def volume(width, height, length):
  return width * height * length

the function named 'volume' is defined.

print(volume(5, 8, 2))

80

Return is used to save a result for the next use. *

Print only shows the result once and does not save it.

def volume(width, height, length):
  return width * height * length

volume1 = volume(5, 8, 2)
print(volume1)

80

def surface_area(width, height, length):
  return 2 * (width * height + height * length + width * length)

print(surface_area(2, 4, 6))

88

area1 = surface_area(2, 4, 6)
print(area1)

88