![]() it is having its own benefits but also there are some drawbacks to it. Nested functions are used in so many applications. It can access all the local variables and scops inside a function in the local environment.But there are some useful applications of it: Well for normal programming purposes we don’t have to use this feature. ![]() ![]() Which is really good for the privacy of data. Output: NameError: name ‘add’ is not definedĪs you can see it is showing an error that we have not defined any function name add. Let us see what will happen if we will call only add function: def double(n): And I am printing the result I am only calling double but for successful execution, I am calling add function inside the double function which is necessary. First I am defining a function double with one parameter and then inside it I am defining another function that is doing mathematical operation for function double. Here I am using a really simple function for double the given input. Let us see the coding part: def double(n): So the conclusion is we don’t need to treat is separate. For calling the function, we use the outer function and with that call, the nested function runs automatically. Now the question is what about calling and how will we call that function? So, if we call it directly it will show us an error which, I am defining in the coding part below. In this blog, we are going to study how to write nested functions, what is the main use of it and the why we need to use the nested function? Function inside a function in Python:Īs we define for loop inside a for loop and call it nested loop same thing we do in nested functions where we define a function inside a function. They are totally hidden from global activities. It is useful to keep data secure from outside things. We call it nested function and we define it as we define nested loops. Introduction: Using a function inside a function has many uses. ![]() This tutorial will guide you to learn how to define a function inside a function in Python.
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