JAVA

 package arrays; import java.util.Scanner; public class AverageMarksOfStudents { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.print("Enter the number ofstudents : "); int n = sc.nextInt(); int[] marks = new int [n]; for(int i = 0; i<n ; i++) { marks [i] = sc.nextInt(); } int averageMarks = 0; for(int i = 0; i<n ; i++) { averageMarks += marks[i]; } averageMarks /= n; System.out.println("The average marks of students are "+ averageMarks); } }

 package arrays; import java.util.Scanner; public class ArrayIntro { public static void main(String[] args) { /* int[] marks; marks = new int[5]; */ //int marks[] = new int [5]; //ALL ARE SAME int[] age = {2,4,8,16,32}; double[] percentage = {1.0,3.14,4.6,78}; Scanner sc = new Scanner(System.in); while(6>age.length) { int n = sc.nextInt(); System.out.println(age[n-1]); }}}