Explain the concept of recursion and how it is used in algorithm design.

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Aryan Kumar · Answer

Recursion is a programming technique that involves calling a function within itself. In other words, a function can call itself repeatedly until a certain condition is met.

In algorithm design, recursion is often used to solve problems that can be broken down into smaller subproblems. The idea is to solve the larger problem by solving the smaller subproblems recursively.

A recursive function typically has two parts: the base case and the recursive case. The base case is the stopping condition that determines when the function should stop calling itself and return a result. The recursive case is the part of the function that calls itself again with a smaller subproblem.

Here is an example of a recursive function to compute the factorial of a number:

public int factorial(int n) {
   if (n == 0) {
       return 1; // base case
   } else {
       return n * factorial(n - 1); // recursive case
   }
}

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Explain the concept of recursion and how it is used in algorithm design.

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