### Automorphic Number

Automorphic number or circular number is a number whose square ends in the same digits as the number itself.

For example,

\[5^2 = 2\boldsymbol{5}\\

6^2 = 3\boldsymbol{6}\\

76^2 = 57\boldsymbol{76}\\

890625^2 = 793212\boldsymbol{890625}\\

7109376^2 = 5054322\boldsymbol{7109376}\]

So, \(5, 6, 76, 890625, 7109376\) are all automorphic numbers.

Below is a program to print automorphic numbers from \(1\) to \(n\):

Executing the program:

$ gcc -o p automorphic_no.c -lm $ ./p Enter n: 9999999 Automorphic numbers from 1 to 9999999 are 1, 5, 6, 25, 76, 376, 625, 9376, 90625, 109376, 890625, 2890625, 7109376,If you've found any errors or want to give a feedback then comment below.