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dim numeric_variable ( posint_expr )
dim string_variable$ ( posint_expr )
dim numeric_variable ( posint_expr , posint_expr )
dim string_variable$ ( posint_expr , posint_expr )

Returns a newly created single dimensional array of length integer or a 2 dimensional array thst can be addressed by row and column. Depending on the variable assignment, a string or numerical array is created.
The first element of an array has an index of 0 (zero). Indexes range from 0 to length-1.

dim z(5)
z = {1, 2, 3, 4, 5}
print z[0] + " " + z[4]

will print

1 5

dim c$(4)
c$ = {"cow", "brow", "how", "now"}
print c$[2] + " " + c$[3] + " ";
print c$[1] + " " + c$[0] + "?"

will print

how now brown cow?