Armstrong number

Armstrong Number

A number is called as Armstrong number if sum of cubes of digits of number is equal to the number itself.

For example: 153,371 etc.

153 is a Armstrong number since

1*1*1 + 5*5*5 + 3*3*3 = 1 + 125 + 27 = 153

Example 1:

#program to check a number is an Armstrong number or not
n=int(input("Enter the number:"))
s=0
k=n
while(n>0):
    d=n%10
    s=s+d**3
    n=int(n/10)
if(s==k):
    print("This is an Armstrong number")
else:

    print("This is not an Armstrong number")

Output:

Enter the number:153
This is an Armstrong number

>>>

Example 2:

#program to display the the Armstrong number between 100 to 1000
for i in range(100,1001):
    n=i
    k=n
    s=0
    while(n>0):
        d=n%10
        s=s+d**3
        n=int(n/10)
    if(s==k):
        print(i)

Output:

153
370
371
407

>>> 

Click the below link to watch the video on Armstrong number

Program to display Armstrong number

Dry Run:

Assume n=153                                                                      s=0 [initial value]

n	d = n%10	s = s+d**3
	153%10=3	0+27=27
153/10=15	15%10=5	27+125=152
15/10=1	1%10=1	152+1=153
1/10=0