Data Structures and Algorithms The Complete Masterclass - Recursion Example - Factorial of a Number

The video tutorial explains the concept of recursion using the factorial function as a common example. It covers the basics of factorial calculation, the importance of the base case, and the recursive pattern. The tutorial guides viewers through writing a recursive factorial function, implementing the recursive formula, and testing the function to ensure it returns the correct result. The video aims to enhance understanding of recursion and its application in programming.

What is the primary purpose of learning about factorials in programming?

• To understand loops

• To grasp the concept of recursion

• To learn about variables

• To practice arithmetic operations

How is the factorial of a number generally calculated?

• By dividing the number by its half

• By multiplying the number by all positive integers less than it

• By multiplying the number by its square

• By adding the number to itself

What is the base case for the recursive calculation of factorial?

• When the number is even

• When the number is negative

• When the number is 0

• When the number is 1

In the recursive formula for factorial, what does n! equal?

• n - (n-1)!

• n / (n-1)!

• n * (n-1)!

• n + (n-1)!

What is the role of the base case in a recursive function?

• To start the recursion

• To multiply the result

• To divide the result

• To end the recursion

What happens when the base case is reached in a recursive function?

• The function continues to call itself

• The function returns a value and stops

• The function multiplies the result by 2

• The function divides the result by 2

How can user input be incorporated into the factorial function?

• By using a random number generator

• By hardcoding the value

• By taking input from the user and passing it to the function

• By using a global variable