About how to use Char.GetNumericValue

he method Char.GetNumericValue retrieves the numeric value of a specific char.

However, it's important to note a few things about this method:

1. It's designed to work on individual char values, not on lists or strings.
2. The method returns a double, because some characters can represent fractional values (like the character for a half, '½', which would return 0.5).
3. If the character does not have a numeric value (like 'a' or '!'), the method returns -1.
   
   
   
   

   For example:

   • If charList[0] is '5', then Char.GetNumericValue(charList[0]) will return 5.0.
   • If charList[0] is 'a', then Char.GetNumericValue(charList[0]) will return -1.0.