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Because the value of number is the address of the first element in
the number array, number is viewed as a pointer.
Accordingly, you can produce the addresses of other array elements using
number in addition expressions:
number + 0 /* Address of the first element */ number + 1 /* Address of the second element */ ... number + n - 1 /* Address of the nth element */
Once you know how to produce addresses from number,
you know how to produce the elements themselves via the
dereferencing operator:
*(number + 0) /* Identifies the first element */ *(number + 1) /* Identifies the second element */ ... *(number + n - 1) /* Identifies the nth element */
Thus, *(number + n) identifies the same element as
number[n]. The bracket notation is just a shorthand
for the addition-cum-dereferencing combination.