CheckArmstrongNumber.java

// JAVA program to find Armstrong 
// numbers between two integers 
import java.io.*; 
import java.math.*; 

class gfg { 

	// Function to print Armstrong 
	// Numbers between two integers 
	static void ArmstrongNum(int l, int h) 
	{ 
		for (int j = l + 1; j < h; ++j) { 

			// Calculating number of digits 
			int y = j; 
			int N = 0; 
			while (y != 0) { 
				y /= 10; 
				++N; 
			} 

			// Calculating the sum of nth 
			// power of all the digits 
			int sum_power = 0; 
			y = j; 
			while (y != 0) { 
				int d = y % 10; 
				sum_power += Math.pow(d, N); 
				y /= 10; 
			} 

			// Checking if the current number 
			// i is equal to the sum of nth 
			// power of all the digits 
			if (sum_power == j) 
				System.out.print(j + " "); 
		} 
	} 

	// The Driver code 
	public static void main(String args[]) 
	{ 
		int n1 = 50; 
		int n2 = 500; 
		ArmstrongNum(n1, n2); 
		System.out.println(); 
	} 
}