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- package ch6;
- public class E1a {
- public static void main(String[] args) {
- int sum = 0;
- for(int i=2; i <= 100; i = i +2){
- sum = sum + i;
- }
- System.out.print(sum);
- }
- }
- package ch6;
- public class E1b {
- public static void main(String[] args) {
- int n = 1;
- int square;
- int sum = 0;
- while (n <= 10) {
- square= (n*n);
- sum += square;
- n++;
- }
- System.out.println(sum);
- }
- }
- package ch6;
- public class E1c {
- public static void main(String[] args) {
- for(int i=1; i <= 20; i++){
- System.out.print(Math.pow(2, i) + " ");
- }
- }
- package ch6;
- import java.util.Scanner;
- public class E1d {
- public static void main(String[] args) {
- Scanner scan = new Scanner(System.in);
- int sumOdds=0;
- int a;
- int b;
- System.out.println("lower value");
- a = scan.nextInt();
- System.out.println("upper value");
- b = scan.nextInt();
- if(a % 2==0)
- {
- a++;
- }
- if( b % 2 ==0)
- {
- b--;
- }
- for(int j=a; j>=a && j<=b; j+=2)
- {
- sumOdds = sumOdds + j;
- }
- System.out.println(sumOdds);
- }
- }
- package ch6;
- public class E1e {
- public static void main(String[] args) {
- int sum= 0;
- int digit=0;
- int number= 123456789;
- while ( number > 0 )
- {
- digit=number % 10;
- if ( digit %2 == 1 )
- {
- sum+=digit;
- }
- number/=10;
- }
- System.out.println(sum);
- }
- }
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