Question

How to check if the last digit of a number power the total digits equal to the number itself in Java

Answer 1

class Program {
    private static boolean last_digit_power_total_digits_equal_to(int num) {
    	int last_digit = num % 10;
    	int total_digits = (int)Math.log10(num) + 1;
    
    	return Math.pow(last_digit, total_digits) == num;
    }
    
    public static void main(String[] args) {
        System.out.println(last_digit_power_total_digits_equal_to(16807));

	    System.out.println(last_digit_power_total_digits_equal_to(89016));

	    System.out.print(last_digit_power_total_digits_equal_to(134217728));
    }
}




/*
run:
 
true
false
true
 
*/

 

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