Python: Define nested function

Python allows you to define nested functions. Let’s see it with an example.

 

What is a nested function?

Function declared inside another function is called nested function.

 

nested_function_demo.py

def arithmetic(a, b):
    def sum(a, b):
        return a + b
    
    def sub(a, b):
        return a - b

    def mul(a, b):
        return a * b

    def div(a, b):
        return a / b

    print('Sum of ', a, ' and ', b, ' is : ', sum(a, b))
    print('Subtraction of ', a, ' and ', b, ' is : ', sub(a, b))
    print('Multiplication of ', a, ' and ', b, ' is : ', mul(a, b))
    print('Division of ', a, ' and ', b, ' is : ', div(a, b))

arithmetic(10, 20)

 

Output

Sum of  10  and  20  is :  30
Subtraction of  10  and  20  is :  -10
Multiplication of  10  and  20  is :  200
Division of  10  and  20  is :  0.5

 

 

 

  

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