Python Program to Find if a Number is Divisible by Another Number

In this tutorial, you will create a Python program to find if a number is divisible by another number or not.

If you are new to Python, to understand this code, you should first check:

• How to get basic input and output in Python
• If and else conditional statements in Python
• While loop in python

Simple Code

num = int(input('Enter the number whose divisibility needs to be checked: '))
div = int(input('Enter the number with which divisibility needs to be checked: '))
if num % div == 0:
    print('The two numbers are completely divisble by eachother.')
else:
    print('The two numbers are not completely divisble by eachother.')

Enter the number whose divisibility needs to be checked: 30
Enter the number with which divisibility needs to be checked: 6
The two numbers are completely divisble by eachother.

Code with handling the wrong inputs such as alphabet and characters

while True:
    try:
        num = int(input('Enter the number whose divisibility needs to be checked: '))
        div = int(input('Enter the number with which divisibility needs to be checked: '))
        if num % div == 0:
            print('The two numbers are completely divisble by eachother.')
        else:
            print('The two numbers are not completely divisble by eachother.')
        break
    except:
        print('Invalid entry. Enter integer values.')

Output

Enter the number whose divisibility needs to be checked: lksdjf
Invalid entry. Enter integer values.
Enter the number whose divisibility needs to be checked: 30
Enter the number with which divisibility needs to be checked: 5
The two numbers are completely divisble by eachother.

Code with explanation (Exception handling)

#program will run until it is executed successfully!
while True:
    #This try block will be executed first and if the user enter an interger, the result will be printed and program will end successfully
    #But if the user enter wrong input such as an alphabet, program will throw an error and will run again
    try:
        #take input from the user
        num = int(input('Enter the number whose divisibility needs to be checked: '))
        div = int(input('Enter the number with which divisibility needs to be checked: '))
        
        #check if the number is divisible by diviser
        if num % div == 0:
            print('The two numbers are completely divisble by eachother.')
        else:
            print('The two numbers are not completely divisble by eachother.')
        #this break command will end the program if it is executed successfully.    
        break
    #But in some cases, the user may enter some alphabet or any other character. Then this error will be displayed and loop will run the program again
    except:
        print('Invalid entry. Enter integer values.')