is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.

Recursion

<a href="https://en.wikipedia.org/wiki/Recursion">Recursion </a> occurs when a thing is defined in terms of itself or of its type. Recursion is used in a variety of disciplines ranging from linguistics to logic. The most common application of recursion is in mathematics and computer science, where a function being defined is applied within its own definition. While this apparently defines an infinite number of instances (function values), it is often done in such a way that no infinite loop or infinite chain of references can occur.

<h1 dir="ltr">&nbsp;Recursion&nbsp;</h1>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;is the
process of repeating items in a self-similar way. In programming
languages, if a program allows you to call a function inside the same
function, then it is called a recursive call of the function.<a href="https://en.wikipedia.org/wiki/Recursion" rel="nofollow" dir="ltr">Recursion</a> occurs when a thing is defined in terms of itself or of its type. Recursion is used in a variety of disciplines ranging from linguistics to logic. The most common application of recursion is in mathematics and computer science, where a function
being defined is applied within its own definition. While this
apparently defines an infinite number of instances (function values), it
is often done in such a way that no infinite loop or infinite chain of
references can occur.Python allows functions to call itself.&nbsp; <img height="481" src="https://miro.medium.com/max/1952/1*TnuBIqdMfzVQL6sXNcURSg.png" width="640"><div>A Recursive Solution comprises of:</div><UL><LI>Base Part </LI></UL><div dir="ltr">&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; It is the solution to the smallest version of the problem.</div><UL><LI>Inductive part</LI></UL><div dir="ltr">&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; It is the Recursive part of the problem That reduces the complexity of the problem. the solution is expressed in terms of a smaller version of itself.&nbsp;</div><h3>Factorial:</h3><div dir="ltr">&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;The product of all positive integers less than or equal to n is the factorial of a non-negative integer n, indicated by n!.</div>n!=n∗(n−1)∗(n−2)∗(n−3)∗...∗3∗2∗1<div>The above function is the Iterative approach to compute the factorial of a positive integer n.</div><div>Since we are using for loop and the loop iterates from 1 to n+1 to calculate the factorial of n.</div>factorial(n)={1n∗factorial(n−1)if&nbsp;n&nbsp;== 0 or 1if&nbsp;n&nbsp;&gt; 1<div>The above example shows us the recursive approach of implementing factorial of any positive integer n.</div><div dir="ltr">
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Recursive Functions is Inception, where function can be assumed of dream,where the function can call itself until the base result is obtained.

Python allows functions to call itself.

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