Difference between Recursion and Iteration
In this article, we will discuss recursion and iteration along with the comparison between them. Both terms repeatedly execute the set of instructions but they are the different terms with different code structures, with the same end result. Sometimes, the terms could be confusing to beginners. So, it is important to know the difference between them.
So, without any delay, let's start the topic. Before jumping directly to the comparison chart, let's first discuss both terms separately with an example of each.
Recursion is said to be the process of repeating things in a similar manner. In computer science, recursion is a process of calling a function itself within its own code. Any function which calls itself is called a recursive function, and such function calls are called recursive calls.
During defining the recursion, one must define an exit condition carefully; otherwise, it will go to an infinite loop. So, it is important to impose a termination condition of recursion. It is slower than iteration because of the overhead of maintaining of the stack. Recursion code is shorter than iterative code; however, it is difficult to understand. Recursive functions are helpful in solving various problems such as finding the factorial of a number, creating the Fibonacci series, etc.
Let's see an example of finding the factorial of a number using recursion.
C program to find the factorial of a number using recursion
In Iteration, there is the usage of loops to execute the set of instructions repetitively until the condition of the iteration statement becomes false. It is comparatively faster than recursion. It has a larger code size than recursion. The termination in iteration happens when the condition of the loop fails.
In iteration, the time complexity is relatively lower than recursion. We can calculate its time complexity by finding the no. of cycles being repeated in a loop.
Now, let's see the program to find the factorial of a number using iteration.
C program to find the factorial of a number using iteration
Recursion v/s Iteration
Now, let's see the comparison between iteration and recursion. We are comparing both terms based on some characteristics.
So, that's all about the article. Hope it will be helpful and informative to you.