9 comments:

  1. import java.util.Scanner;

    class Test{

    public static void main(String ar[])
    {

    Scanner sc=new Scanner(System.in);
    int num,sum=0,k=1;
    System.out.println("Enter Number");
    num=sc.nextInt();


    for(int i=1;i<=num;i+=2){

    if(k%2==0){sum-=i;System.out.printf("-%d",i);}
    else{sum+=i;System.out.printf("+%d",i);}
    k++;
    }

    System.out.printf(" = %d",sum);


    }
    }

    ReplyDelete
  2. import java.util.Scanner;

    class Test
    {

    public static void main(String ar[])
    {

    int flag=0,i=1,j=3,limit,sum=1;
    System.out.print("Enter the limit: ");
    Scanner w=new Scanner(System.in);
    limit=w.nextInt();
    System.out.print("1");
    for(i=1;i<limit;i++,j+=2)
    {
    if(flag==0)
    {
    flag=1;
    System.out.print("-"+j);
    sum-=j;
    }
    else
    {
    flag=0;
    System.out.print("+"+j);
    sum+=j;
    }
    }
    System.out.print("\n The sum is: "+sum);

    }
    }

    ReplyDelete
  3. import java.util.Scanner;

    class SeriesN{

    public static void main(String ar[])
    {

    Scanner sc=new Scanner(System.in);
    int Number,Total=0,a=1;
    System.out.println("Enter Number");
    Number=sc.nextInt();


    for(int i=1;i<=Number;i=i+2){

    if(a%2==0)
    {
    Total=Total-i;
    System.out.print("-"+i);
    }
    else
    {
    Total=Total+i;
    System.out.print("+"+i);
    }
    a++;
    }

    System.out.print("="+Total);


    }
    }

    ReplyDelete
  4. import java.util.Scanner;

    public class series {
    public static void main(String ar[])
    {
    Scanner scan = new Scanner(System.in);
    int n;
    System.out.println("enter the value of n upto which u wnt sum");
    n = scan.nextInt();
    int sum=0;
    for(int i=0;i<=n;i++)
    {
    if(i%2!=0)
    sum+=i;
    }
    System.out.println("the sum of the series is : "+sum);
    }
    }



    ReplyDelete
  5. package forloop;
    import java.util.*;
    public class Nterms
    {
    public static void main(String args[])
    {
    int i,n,sum=0;
    System.out.println("Enter a number");
    Scanner sc=new Scanner(System.in);
    n=sc.nextInt();
    for(i=1;i<=n;i+=2)
    {
    sum=sum+i/2;
    }
    System.out.println(sum);
    }
    }

    ReplyDelete
  6. import java.util.Scanner;
    class Series{
    public static void main(String ar[]){
    Scanner obj=new Scanner(System.in);
    int i,num,sum=0,sum2=0,j;
    System.out.println("enter the number");
    num=obj.nextInt();
    for(i=1;i<=2*(num)-1;i=i+4)
    sum=sum+i;



    for(j=3;j<=2*(num)-1;j=j+4)
    sum2=sum2+j;
    System.out.println("sum is "+(sum-sum2));
    }

    }

    ReplyDelete
  7. import java.util.Scanner;
    class Series{
    public static void main(String ar[]){
    Scanner s=new Scanner(System.in);
    int n,pos,sum=0,i=1;
    System.out.print("enter the numer of terms:");
    n=s.nextInt();

    for(pos=1;pos<=n;pos++)
    {
    if(pos%2==0)
    {
    sum=sum-i;
    }
    else
    {
    sum=sum+i;
    }
    i+=2;
    }
    System.out.print("sum: "+sum);
    }
    }


    ReplyDelete
  8. import java.util.Scanner;
    class Series{
    public static void main(String args[]){
    int n,i=0,sum=0,j=1;
    Scanner scan=new Scanner(System.in);
    System.out.println("Enter the value");
    n=scan.nextInt();
    for(i=1;i<=n;i++)
    {sum=0;
    if(i%2==0)
    {
    sum=sum-j;
    System.out.print(+sum);
    }
    else if(j!=1)
    {
    sum=sum+j;
    System.out.print("+"+sum);
    }
    else
    {
    sum=sum+j;
    System.out.print(+sum);
    }
    j+=2;

    }
    }
    }

    ReplyDelete
  9. import java.util.Scanner;

    public class SUM{
    public static void main(String args[]){

    int n,i=1,sum=0;
    Scanner SUM=new Scanner(System.in);
    System.out.println("Enter Valu of n");
    n=SUM.nextInt();

    for(int pos=1;pos<=n;pos+=2){

    if(pos%2==0){

    sum=sum-i;
    }else{

    sum=sum+i;
    }

    }

    System.out.println("SUM="+sum);
    }

    }

    ReplyDelete