Introduction to Arrays

Author: kishanrajput23

26.Introduction_To_Arrays/Chapter_6_Arrays.pdf

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+package com.company;
+
+public class cwh_26_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(marks[4]);
+    }
+}