ARRAYS.java

public class ARRAYS {
    public static void main(String[] args) {
        /* Classroom of 500 students - You have to store marks of these 500 students
        You have 2 options:
        1. Create 500 variables
        2. Use Arrays (recommended)
        */
        // There are three main ways to create an array in Java
        // 1. Declaration and memory allocation
        // int [] marks = new int[5];

        // 2. Declaration and then memory allocation
        // int [] marks;
        // marks = new int[5];
        // Initialization
        // marks[0] = 100;
        // marks[1] = 60;
        // marks[2] = 70;
        // marks[3] = 90;
        // marks[4] = 86;

        // 3. Declaration, memory allocation and initialization together
        int [] marks = {98, 45, 79, 99, 80};

        // marks[5] = 96; - throws an error
        // System.out.println("Size: "+marks.length+"\nArray elements:");
        // for (int i = 0; i<marks.length;i++){
        //     System.out.println(" "+marks[i]);
        // }

        // printing using for each loop
        for (int element: marks){
        System.out.println(" "+element);        
        }
        
    }
}