Python program to find reverse of a number

Hello everyone, welcome back to programminginpython.com! Here we will learn a simple Python logic to reverse a number. So I will now write a Python program that will find the reverse of a number,

Here we read a number from the user and reverse it using some arithmetic operations like mod (%) and floor division (//) to find each digit and build the reverse of it.

We can also efficiently do this by using slice operations, reversing a number using a slice discussed in the previous post.

You can also watch the video on YouTube here.

Program on GitHub

Task :

To reverse a given integer number.

Approach :

1. Read an input number using input() or raw_input().
2. Check whether the value entered is an integer or not.
3. Check integer is greater than 0
4. Initialize a variable named reverse to 0
5. Find remainder of the input number by using the mod (%) operator
6. Now multiply reverse with 10 and add remainder to it
7. Floor Divide input number with 10
8. At some point, the input number will become 0
9. Repeat steps 5, 6, and 7 until the input number is not greater than zero
10. Print the variable reverse.

Program on GitHub

Program :

input_num = (input("Enter any Number: "))
reverse = 0
try:
    val = int(input_num)
    while val > 0:
        reminder = val % 10
        reverse = (reverse * 10) + reminder
        val //= 10
    print('Reverse of entered number is : ', reverse)
except ValueError:
    print("That's not a valid number, Try Again !")

Output :

Program on GitHub

That is it for this post, you can find more math-related programs here

• Python program to find Factorial of a given number
• Python program to find area of a triangle (given all sides)
• Python program to find a number is prime or composite
• Python Program to find the LCM of two numbers
• Find square root of a number using exponential operation
• Find square root of a number using sqrt() function

or some basic programs here.

• Python program to find reverse of a number
• Python Program to check Armstrong number or not
• Python program to find reverse of a number using slice
• Python program to find average of N numbers
• Python program for performing Arithmetic Operations
• Python program to find area of a triangle (given all sides)
• Python program to find a number is prime or composite
• Python program to find area of triangle (given base and height)
• Python program to find Factorial of a given number
• Python tuple operations – Add, Remove, Slice, Concat, Reverse
• Python program to find number of digits in a number
• Python Dictionary and its operations
• Count vowels in a string – Python Program
• Python Program to find the LCM of two numbers
• Python Program to find the Biggest and Smallest of 3 numbers
• Python program to merge or concatenate two lists
• Python Program to find whether an integer is even or odd number
• Find the Biggest and Smallest of 3 numbers using lists in Python
• Python Lists – Add, Append, Modify, Remove, Slice
• Python program to calculate the sum of elements in a list
• Python program to find the largest and smallest number in a list
• Python program to check whether a number is Palindrome or not
• Python Program to separate even and odd numbers in a list
• Find square root of a number using exponential operation
• Find square root of a number using sqrt() function