Background Information: * Array is a list of data items that all have the same data type and the same name * Each item in the array is called an element . * Each element has an index. Beginning index is 0

Example 1: Suppose we would like to store the scores of 4 students in a classroom
// create an array called scores whose size is 4 and stores numbers of type double double[ ] scores= new double[4];
//Assign values to the elements of the array . scores [0]=90; scores[1]= 95; scores [2]=70; scores[3]= 60; 90 | 95 | 70 | 60 | scores [0] scores [1] scores [2] scores [3]

Example 2:
You can also assign values to array elements using an Initializer list:
// create an double array called scores and fill it with the 4 test scores 90, 95, 70, 60 double[ ] scores = {90, 95, 70, 60}; 90 | 95 | 70 | 60 | scores [0] scores [1] scores [2] scores [3] * Write code to display the value of the third element in a label: lblOutput.Text = scores[2].ToString(); * write a line of code to get the length of the array

int size = scores.Length; // size is 4

Exercise 1 Code | | string[] letters = {“A”,”B”};int size = letters.Length; | What is the value of size ?What is stored in letters[1] ? |

Exercise 2 Code | | int[] numbers = {10,20,30};int size = numbers.Length; | What is the value of size ?What is the value of : numbers[0] + numbers[1] + numbers[2] ? |

Exercise 3 Code | After code executes: | int[] numbers = {10,20,50};int size = numbers.Length;numbers[2]= numbers[0]+ numbers[1]; | What is stored in numbers[2] ? |

Exercise 4 Write code that initializes all the elements in an integer array grades (of size 10) to zero .i.e. need to fill the elements of the array with the value zero | int[] grades = new grades[10];// create the arrayfor (int i = 0; i <= 9; i++) { grades[?]= 0; } |

Task 1 Create an appliacation and design the form as follows:When the button is clicked you should declare and initialize a grades array to the integer values : 95, 60, 80. The numbers in the array are then displayed in a listbox lstOutput in this format:956080 | solution |

Task 2:Create an application and design the form as follows:When the button is clicked you should declare and initialize a myScores array to the integer values : 100, 90, 80, 70You should then calculate and display the sum and average of the numbers in the in labels | } |

Task 3
Write a program that allows the user to enter up to 2 orders .The program should store the order totals in an array. When the Calculate button is clicked the total is calculated as 100 * quantity entered.
If the user attempts to enter more than 2 orders, an error message will alert the user.
When the Statistics button is clicked the sum of the totals in the array and the average are displayed in a MessageBox.

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