> arithmetic on the elements of this array. How is this
 > possible, after all elements in the array are
 > characters not integers ? Can u pls explain me a bit .

    Ints are whole numbers between 0 and MAXINT in value. Chars are whole
numbers in the range 0 to MAXCHAR (often 255 for unsigned and 127 for
signed char). Both ints and char can be signed or unsigned.
Integer arithmetic can be performed on both types.

    I hope this answers your question.

Best Wishes,
Bill.

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