Page 324 - ComputerScience_Class_11

11.2 NEED FOR AN ARRAY
When the program requires us to create many variables of the same data type, for example, if we need to take 100
integer values one after another, then it becomes very difficult to create separate variables and take values. So, we use
the concept of Array. Let us understand this by taking the following example.

Program 1 Write a Java program to input marks of five students in English and print the marks, their
sum and average.
1 import java.util.*;

2 class sum_avg
3 {
4 public static void main(String args[])
5 {

6 Scanner sc = new Scanner(System.in);
7 int a, b, c, d, e, sum;
8 double avg;
9 System.out.println("Enter marks of five students in English");
10 a=sc.nextInt(); b=sc.nextInt(); c=sc.nextInt();
11 d=sc.nextInt(); e=sc.nextInt();

12 sum = a+b+c+d+e;
13 avg=sum/5.0;
14 System.out.println("The entered numbers:");
15 System.out.println(a+","+b+","+c+","+d+","+e);

16 System.out.println("The total marks are: " +sum);
17 System.out.println("The average marks are: " +avg);
18 }
19 }

The output of the preceding program is as follows:

BlueJ: Terminal Window - Java
Options

Enter marks of ten students in English
45
65
98
74
95
The entered numbers:
45,65,98,74,95
The total marks are: 377
The average marks are: 75.4

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