Goal:

1
Goal

• We would like to store the grades of 25 students
• var
• i1,i2,i3,i4,i5,i6....i25 Integer
• ...do able, but tiring...what if you want to
  store 100 students? 1400?

2
Array (Static)

• Need to be able to store many data items of the
  same type efficiently . . . we can't create
  hundreds of variables.
• . . . we need Arrays
• Var
• myArray Array1..100 of integer
• //allocated space for 100 integers
• myList Array1..25 of String //array of str

3
Usage

• Use the arrays just like any other variable,
  only, you need the variable name and index
• myArray1 10
• myArray8 MyArray9
• myArray25 Random(10)1

4
Example Initialize an Array

• Var
• list array1..25 of Integer
• i integer
• Begin
• i 1
• while(i lt 100) do
• Begin
• listi 0 // oder listi i
• i i 1
• End
• . . . //usw.

5
Matrix 2 Dimensional

• A matrix is like a spreadsheet, rows and columns
• myMatrix array 1..10, 1..5 of integer
• myMatrix3, 5 25
• myMatrix1,1 myMatrix1,1 2