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Problem Name: single_digit
//'main' method must be in a class 'Rextester'. //Compiler version 1.8.0_111 import java.util.*; import java.lang.*; class Rextester { public static void main(String args[]) { SingleDigit obj = new SingleDigit(); Scanner input = new Scanner(System.in); System.out.println("Enter Number: "); int num = input.nextInt(); int sum = obj.sumDigits(num,0); if(sum >= 10) sum = obj.sumDigits(sum, 0); System.out.println(sum); } } class SingleDigit { int sumDigits(int n, int sum) { if (n== 0) { return sum; } else { sum = sum + n % 10; n= n/10; return sumDigits(n, sum); } } }
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