OA-OD-JD1
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When working with arrays, there's an easier way to loop through the indices than manually doing so. We can use the enhanced for statement for this.

class Class1{
   public static void main(String args[]){
	   int aryOne[] = {3,4,5,6,7};
	   int total = 0;
	   for (int x: aryOne){
		   total += x;
	   }
	   System.out.println(total);
   }
}

First of all, we create our array (aryOne) and use

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We're going to build a program to re-enact a dice being rolled one thousand times. We're going to output how many times each face of the dice is rolled.

import java.util.Random;
 
class RollDice{
   public static void main(String args[]){
	   Random rand = new Random();
	   int freq[] = new int[7];
 
	   for(int roll = 1; roll <= 1000; roll++){
		   ++freq[1 + rand.nextInt(6)];
	   }
	   System.out.println("Face\tFrequency");

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Say we have an array with ten indices. Below is how we can calculate the sum of these indices.

class Class1{
	public static void main(String args[]){
		int[] array1 = {1,2,3,4,5,6,7,8,9,10};
		int total = 0;
 
		for(int counter = 0; counter < array1.length; counter++){
			total += array1[counter];
		}
 
		System.out.println("Total\t" + total);
 
	}
}

Firstly, initialise

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Arrays are used to store many values under the one variable, so to speak. You can initialise an array the long and drawn out way by manually assigning each index a value or you can implement an array initialiser to do the job for you.

class Class1{
	public static void main(String args[]){
		int array1[] = new int[10];
		array1[0] = 87;
		array1[1] = 543;
		array1[2] = 65;
		System.out.println(array1[2]);
 
		int array2[]

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Random numbers can be used in Java. Here's a small random number generator and how it works.

import java.util.Random;
class Class1{
	public static void main(String args[]){
		Random dice = new Random();
		int number;
 
		for(int counter = 1; counter <= 10; counter++){
			number = dice.nextInt(6) + 1;
			System.out.println(number);
		}
	}
}

First of all, we need to import the random class.

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