Page 226 - ComputerScience_Class_11

10 System.out.println("2. s = 1/a + 2/a + 3/a + 4/a +.... + to n terms ");

11 System.out.println("Enter your choice ");
12 ch=sc.nextInt();

13 switch(ch)
14 {
15 case 1: System.out.println("Enter nth term ");

16 n=sc.nextInt();
17 for(i=1; i<=n; i++)

18 {
19 s=s+1.0/(double)i;
20 }

21 System.out.println("Sum = " +s);
22 break;

23 case 2: System.out.println("Enter nth term ");
24 n=sc.nextInt();
25 System.out.println("Enter \"a\" ");

26 a=sc.nextDouble();
27 for(i=1; i<=n; i++)
28 {

29 s=s+i/a;
30 }

31 System.out.print(s);
32 break;
33 default: System.out.println("Wrong Choice");

34 }
35 }
36 }

The output of the preceding program is as follows:
BlueJ: Terminal Window - Java

Options

1. s = 1 + 1/2 + 1/3 + ..... 1/n
2. s = 1/a + 2/a + 3/a + 4/a +.... + to n terms
Enter your choice
1
Enter nth term
5
Sum = 2.283333333333333

224 Touchpad Computer Science (Ver. 3.0)-XI