Python program to find Armstrong number

In this Python example you are going to learn how to find a number is an Armstrong number or not. An “Armstrong number” is a number that is equal to the sum of the nth powers of its individual digits. For example, 371 is an Armstrong number where it has 3 digits and 3³7³1³ = 371

Here is the Python script for finding the Armstrong number.

print("Enter the number")
#get the number
number = int(input())
#store it in a temp
temp = int(number)
Sum = 0

#loop till the quotient is 0
while(temp != 0):
    rem  = temp % 10 #find reminder
    Sum  = Sum + (rem * rem * rem) #cube reminder and add it to the Sum
    temp = temp / 10 #find quotient, if 0 then loop again

#if the entered number and the Sum value matches, it is an Armstrong number
if(number == Sum):
    print ("Armstrong Number")
else:
    print ("Not an Armstrong Number")
    

The above code is self explanatory, just read the comments to understand it.

Below are the Armstrong number, use these number to test this above code:

1. 153
2. 371
3. 407

And if you are looking for web based Python CGI Script to test Armstrong number, here it is:

#!/usr/bin/python
print "Content-type: text/html\n\n";

# Import modules for CGI handling 
import cgi, cgitb 

# Create instance of FieldStorage 
form = cgi.FieldStorage() 

number = form.getvalue('number')

if(number):
	#store it in a temp
	temp = int(number)
	Sum = 0

	#loop till the quotient is 0
	while(temp != 0):
		rem  = temp % 10 #find reminder
		Sum  = Sum + (rem * rem * rem) #cube reminder and add it to the Sum
		temp = temp / 10 #find quotient, if 0 then loop again

	#if the entered number and the Sum value matches, it is an Armstrong number
	if(int(number) == Sum):
		print "Armstrong Number"
	else:
		print "Not an Armstrong Number"
    

print '''
<html>
<body>
    <h3>Web Based Python script to Find Armstrong Number - <a href="http://www.tutorialsmade.com/">Tutorialsmade.com</a></h3>
    <form action="" method="post">
        <label>Enter a number to check <label>
        <input type="text" name="number" />
        <input type="submit" value="Submit" />
    </form>
</body>
</html>
'''

And finally the Demo,