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Automorphic Number #353

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42 changes: 42 additions & 0 deletions Task3/java/Automorphic Number
Original file line number Diff line number Diff line change
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Given a number N, the task is to check whether the number is Automorphic number or not.
A number is called Automorphic number if and only if its square ends in the same digits as the number itself.

Input : N = 25
Output : Automorphic
As 25*25 = 625

Input : N = 7
Output : Not Automorphic
As 7*7 = 49

SOLUTION:
class Test {
// Function to check Automorphic number
static boolean isAutomorphic(int N)
{
// Store the square
int sq = N * N;

// Start Comparing digits
while (N > 0) {
// Return false, if any digit of N doesn't
// match with its square's digits from last
if (N % 10 != sq % 10)
return false;

// Reduce N and square
N /= 10;
sq /= 10;
}

return true;
}

// Driver method
public static void main(String[] args)
{
int N = 5;

System.out.println(isAutomorphic(N) ? "Automorphic" : "Not Automorphic");
}
}