Python Program to Reverse Numbers

Reverse of a number in python; In this tutorial, you will learn how to reverse number in python program using while loop and recursion function.

Python Program to Reverse Numbers

Python Program to Reverse a Number using While loop
Python Program to Reverse a Number Using Recursion

1: Python Program to Reverse a Number using While loop

Take input from the user in program.
Define 0 to the variable “test_num”.
Check whether the given number is greater than zero using while loop.
If yes, find the remainder by performing modulus of 10 with the input.
Multiply test_num by 10 and add the remainder to it, store the answer in rev.
Get the quotient of the input.
The loop will repeat until the number is reversed.
Print Reverse a number

 # Get input from the user
num = int(input("Please enter any number: "))

# Initiate value to null
test_num = 0

# iterate number using while loop
while(num>0):
  #Logic to reverse a number
  remainder = num % 10
  test_num = (test_num * 10) + remainder
  num = num//10

# print the result
print("The reverse number is : {}".format(test_num))

Output

Please enter any number:  123 
The reverse number is : 321

2: Python Program to Reverse a Number using Using Recursion

Take input from the user in program.
Define 0 to the variable “output”.
Define function and Implement logic to reverse a number
- Check whether the given number is greater than zero using while loop.
- If yes, find the remainder by performing modulus of 10 with the input.
- Multiply test_num by 10 and add the remainder to it, store the answer in rev.
- Get the quotient of the input.
- The loop will repeat until the number is reversed.
Call Function, which is define above.
Print Reverse a number.

# Get input from user
Num = int(input("Please Enter any Number: "))

Output = 0
def revNum(Num):
    global Output
    if(Num > 0):
        Reminder = Num %10
        Output = (Output *10) + Reminder
        revNum(Num //10)
    return Output

Output = revNum(Num)

print("Reverse of entered number is = %d" %Output)

Output

Please Enter any Number:  456 
Reverse of entered number is = 654

Python Program to Reverse Numbers

Python Program to Reverse Numbers

1: Python Program to Reverse a Number using While loop

2: Python Program to Reverse a Number using Using Recursion

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