Program to Find the Reverse of a Number in Python

Reversing a Number

The reverse of a number is obtained by extracting each digit and constructing a new number in reverse order.

We will explore a method to compute the reverse of a number using Python programming.

Method: Using a while Loop

We extract each digit using the modulus operator and build the reversed number.

num = int(input("Enter a number: "))
reversed_num = 0

# Loop to extract and reverse digits
while num > 0:
    digit = num % 10  # Extract last digit
    reversed_num = reversed_num * 10 + digit  # Construct reversed number
    num //= 10  # Remove last digit from number

# Print the result
print("Reversed number =", reversed_num)
            

Output:

Enter a number: 1234
Reversed number = 4321