Nested Functions in Python

To shorten the code, you can nest functions within each other when calling them.

Let's say we have functions for squaring a number, cubed a number, and summing two numbers:

pythondef square(num):
  return num ** 2
  
def cube(num):
  return num ** 3
  
def add(num1, num2):
  return num1 + num2

To get the sum of the square and cube of a number, we can put them into the add function parameter when calling it:

pythonres = add(square(2), cube(4))
print(res) # 68

You can also call functions within the body of another function. Let's rewrite the previous example and call functions inside add:

pythondef add(num1, num2):
  return square(num1) + cube(num2)
  
res = add(2, 4)
print(res) # 68