Arrays
 


Description

    Arrays are Variables which contain more than one value. The value decided upon is chosen using an index which is an integer value between 0 and the number of elements in the array. In ARMbasic , any array must be declared before it's first use using the DIM command.
   
    The best way to conceptualize an array is look at it like a spreadsheet. For example, if you had an array called myArray which contained elements (0 to 10), and was filled with random numbers, you could look at it like this:
Index        Data
0              4
1              5
2              2
3              6
4              5
5              9
6              1
7              0
8              4
9              5
10             7


    Keep in mind that the numbers in the Data column are completely arbitrary in our example. When you create an array in ARMbasic using the DIM command, the elements are all set to 0.
    If you were to look at myArray(1), you'd find it's equal to 5. If you were to look at myArray(5),you'd find it equal to 9. In ARMbasic , you can for the most part treat arrays with indexes the same as you would all Variables.  
   
    Arrays can hold BYTE, INTEGER or SINGLE values.  Index values are always computed as integers, so that any SINGLE variable used inside the (index expression) is truncated to an INTEGER.

Example



DIM Numbers( 10)
DIM OtherNumbers( 10)

Numbers(1) = 1
Numbers(2) = 2
OtherNumbers(1) = 3
OtherNumbers(2) = 4

GOSUB PrintArray

FOR a = 1 TO 10
 PRINT Numbers(a)
NEXT a

PRINT OtherNumbers(1)
PRINT OtherNumbers(2)
PRINT OtherNumbers(3)
PRINT OtherNumbers(4)
PRINT OtherNumbers(5)
PRINT OtherNumbers(6)
PRINT OtherNumbers(7)
PRINT OtherNumbers(8)
PRINT OtherNumbers(9)
PRINT OtherNumbers(10)

PrintArray:
 FOR i = 1 TO 10
  PRINT otherNumbers(i)
 NEXT i
RETURN  


See also