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import java.util.Scanner; public class SumOfDigits{ public static void getSumOfDigits(int enteredNumber){ int remainder=0,sumUp=0; do{ remainder=enteredNumber%10;        //get remainder value enteredNumber=enteredNumber/10;  //get divided value sumUp+=remainder; }while(enteredNumber>10); System.out.println(enteredNumber+sumUp); } public static void main(String [] args){ Scanner sc=new Scanner(System.in); System.out.println("Enter the number: "); int number=sc.nextInt(); getSumOfDigits(number); sc.close();//always close the scanner. } } output: Enter the number: 123 6 output is calculated like this..1+2+3=6;

import java.util.Scanner; public class PrimeNumber{ public static void listPrimeNumbers(int input){ for(int j=2;j<=input;j++){ checkPrimeNumber(j); } } public static void checkPrimeNumber(int enteredNumber){ int count=0; for(int i=2;i<=enteredNumber;i++){ if(enteredNumber%i==0){ count++; } } /*if(count>=2){ System.out.println(enteredNumber+ " is not a prime number."); }else { System.out.println(enteredNumber+ " is prime number"); }*/ if(count<2 p=""> System.out.println(enteredNumber); } } public static void main(String [] args){ Scanner sc=new Scanner(System.in); System.out.println("Enter the number:"); int number=sc.nextInt(); listPrimeNumbers(number); } } output: Enter the number 11 2 3 5 7 11 Note: I have created two methods, either you list the prime numbers based on yo

public class FindSecondHighest{ public static void main(String [] args){ int [] numberList={9,15,6,15,18,13,11,4,12,23}; int arrayLength=0,arrayValue=0,arrayMatch=0,count=0,secondLeastValue=0;   arrayLength=numberList.length;   for(int i=0;i   arrayValue=numberList[i];//takes the first value from array;   for(int j=0;j   arrayMatch=numberList[j]; //takes the first value from array;     if(arrayValue count++;   //if the condition is matched counting starts.   }   }     //One of the way for finding seconding least number   else if(count==(arrayLength-2)){   secondLeastValue=arrayValue;   }   count=0;//resetting the counter     }   System.out.println("The second Least Value "+secondLeastValue); } } output: The second Least Value 9