Important concept about Arrays

Question 1

1. what is an anonoymous Array?

Answer 1

1. An ananomous Array is an array without a variable referencing it.
   example: new int[] {1,2,3,4,5};

Question 2

1. how do we return array from method?

Answer 2

int[] numbers = {2,3,4,5,6};
return numbers;

2. return new int[] {2,3,4,5,6}
   // this code does the same thing as the code above

Question 3

methods used to print array

Answer 3

1.printArrays(); this method print array.
2.toString(); // this method print the string representation of array.

Question 4

method to fill Array

Answer 4

1.fill(); // this method fill the whole array. example: string[] names = new string[3] // this create an array object in the computer memory.
Arrays.fill( string, “matthew”); // this method fill the array with the value/data matthew.

2.fill(array,fromindex, toindex, value); // this method fill the array at a specific index.

Question 5

1. How to get the sum in an array.

Answer 5

Sum += number[i] // this is how we get the sum of the element in an array.

Question 6

1. How do we get the product of the element in an array.

Answer 6

product *= number[i] // this is how we get the product of the element in an array.

Question 7

1. How do we get the average of the element in an array.

Answer 7

double average = double(sum) / number.length;

Question 8

1. how do we search an array.

Answer 8

if(searchElement == number[i])
// this search the element in an array. and see if searchelement is equal to the element in the array.

Question 9

1. How do we pass object and primitive data to method.

Answer 9

we can pass a primitive and non primitive to a method at the same time.
example: (int[] numbers, int n );