declaring variables

what is an array

a fixed length, data structure and stores multiple elements of the same data type.

what is the structure of 1D arrays

DECLARE <identifier> : ARRAY[<lower>:<upper>] OF <datatype>

what is the structure of a 2D array

DECLARE <identifier> : ARRAY[<lower1>:<upper1>, <lower2>:<upper2>] OF <datatype>

what does DECLARE studentsnames: ARRAY[1:30} OF STRING show, annotate this.

studentsname is the identifier

ARRAY [1:30] means that there is 30 elements in the array

STRING is the type of data can go into the data so since its string it is letters.

what does DECLARE noughtsandcrosses : ARRAY [1:3, 1:3] OF CHAR show, annotate this.

noughtsandcrosses is the identifier

ARRAY [1:3, 1:3] means there is 3 rows and 3 columns to create a 3×3 grid

CHAR means only single characters can be stored into the array