RE: Newbie question on string operators in C#

In VB, that would be:
If s(i) >= "A"c AndAlso s(i) <= "Z"c Then
fs(k) = 10 + CInt(Fix(s(i) - AscW("A"c)))
k += 1
End If

Unlike VB, in C# 'character math' is possible (but not very common). In C#
characters have this dual nature - what your intuition says characters are in
addition to the underlying numeric value.

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"Richard" wrote:

Can anyone help a VB programmer understand the following C# code snippet
please? This is excerpted from a base conversion function that converts s (a
string representing a number in any base 2 to 36) into a string representing
the number in another base.

if (s[i] >= 'A' && s[i] <= 'Z') { fs[k++] = 10 + (int)(s[i] - 'A'); }

si[i] is simply a character in a string passed to the function.

fs, according to the author, is an "array of integer digits representing the
number in base:from".

What I don't understand is .... (int) (s[i] - 'A') , since both s[i] and A
are characters.

If, say, s[i] evaluates to 'F', then how does C# treat (int) ('F' - 'A')?
Does it simply convert the two characters into their ASCII numbers, thereby
evaluating it to 5?

TIA



.

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