(-) Symbol Used in Convert Method

c#

Solution

The `-` (minus) does exactly what it always does - subtracting. What happens here is subtracting the character code of zero `'0'` from the character at `[i,j]`. This converts a digit character to an integer value of the corresponding digit. For example, if you calculate

char digitChar = '7';
int digitVal = digitChar - '0';

the value of `digitVal` is seven.

Problem

I was going through some C# code and came upon this line: ``` Matrix[i, j] = Convert.ToInt32(grab[i, j] - '0'); ``` What exactly does the ( - ) do?? What would be another way to write this if there is one?

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