ConvertToBaseN.java

package com.interview.number;

public class ConvertToBaseN {

    int baseN(int num,int base){
        if(base > 10){
            throw new IllegalArgumentException();
        }
        int result =0;
        int pow = 1;
        while(num > 0){
            result += pow*(num%base);
            pow = pow*10;
            num /= base;
        }
        return result;
    }
    
    public static void main(String args[]){
        ConvertToBaseN ctb = new ConvertToBaseN();
        System.out.println(ctb.baseN(13, 9));
    }
}