array multiplication odd output

So I have an array : isbn[20][20]

and then i input : 978-0-306-4061

then i try to multiply the first character, 9, by one :

s = isbn[0][0] * 1;

and instead of 9 i get.. 56.. i don't get why.

Any ideas?

Thanks

The ascii value for the representation of the char '9'. (Although according to asciitable.com it's 57 not 56).

If you want to convert that to the numeric value of 9 then you'd need to subtract char '0' first.

ah yes, you're right its actually 57. so there's no way of just normally adding or subtracting array values?