Python Practice Questions Tutorial

Find GCD of Two Numbers Using Recursion

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A Python program to compute the Greatest Common Divisor (GCD) of two numbers using recursion and the Euclidean algorithm.

Code Explanation in Short Points

Function Definition (gcd(a, b))
- A recursive function to calculate the Greatest Common Divisor (GCD).
Base Case (if b == 0)
- If b == 0, return a as the GCD.
Recursive Case (gcd(b, a % b))
- Call the function again with gcd(b, a % b).
- This process continues until b becomes 0.
User Input (num1 and num2)
- Takes two numbers from the user using input().
Function Call (gcd(num1, num2))
- Calls the function and prints the result.

Program:

def gcd(a, b):

    if b == 0:

        return a

    else:

        return gcd(b, a % b)

num1 = int(input("Enter first number: "))

num2 = int(input("Enter second number: "))

print(f"GCD of {num1} and {num2} is {gcd(num1, num2)}")

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Find GCD of Two Numbers Using Recursion

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