Subscripts
The phrase identifier[expression] is like identifier.field-name except that the �field name� is an integer computed by evaluating the expression.
Subscripts can be specified by arbitrary expressions. The value of the subscript is obtained by evaluating the expression.
The value of the subscript must be in the range 0 through one less than the number of elements in the array.
Do not confuse the subscript of an array element with the value contained in the array element.