This content originally appeared on DEV Community and was authored by Shubham Jadhav
Hello Guys, Today is this article we are taking about Recursion.
We are solving and understanding a problem by using Recursion in JavaScript.
? Problem :- Find odd-even number using Recursion ?
Let's start today's article...
• What is recursion?
=> Recursion mean calling itself till condition not true. A function call itself that's function called Recursive function.
• How to find odd even number in JavaScript?
=> We are finding odd-even number by dividing 2. When the reminder is 0 it's mean the number is even or reminder is 1, it is odd number. Right...
We are using same logic in today's solving problem using recursion but different.
? Let's start solving problems
• First we create a function and pass one parameter. As following ?
• We are using same logic as we use always to find odd even number but in this problem we are consider if the parameter's value is 0 it is even or if it's value is 1 it means number is odd.
• See following code to better understand, we are using if-else condition. ?
• Now time to use recursion function but before using recursion we simply decrease parameter 'num' value by 2.
Because odd and even number difference is 2 for example 1 and 3 difference is 2 and also 2 and 4 difference is 2. See below ?
• In the above code, in a line number 14 we are calling a function that's mean it will call itself till when given condition not true.
• Let's check the output ?
? Thanks for reading...
? Stay with us for more....
This content originally appeared on DEV Community and was authored by Shubham Jadhav
Shubham Jadhav | Sciencx (2021-09-25T05:54:10+00:00) ODD-EVEN Number using Recursion in JS ?. Retrieved from https://www.scien.cx/2021/09/25/odd-even-number-using-recursion-in-js-%f0%9f%9a%80/
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