Recursion In C Program In this tutorial, We will learn about recursion in C programming language. Introduction The process in which a function calls itself directly or indirectly is called recursion and the corresponding function is called as a recursive function. Base Condition: In Recursion: in a recursive program base case provide the solution to the smallest problem Expression: In a recursive program we write an expression for the bigger problem in term of smaller problems Example: Calculate the Factorial of n. Factorial(n) = (n) x (n-1) x ... x 1 Base Condition: the factorial of smallest number i.e 1 is 1 hence base condition is if n equal to 1 factorial will be 1 Expression: Suppose we want to calculate factorial of n and we already know the factorial of n-1 we can calculate factorial of n by multiplying n to the factorial of n -1. for example if we want to calculate factorial of 5 and we already know factorial of 4 we can calculate factorial ...