How to convert letters to number?

Question

What is the easiest way of converting a letter to integer in below fashion A=1 B=2 C=3  .... Z=26. Also the small letter counterparts will have the same value is well like  c should also be equal to 3 and so on.

Ankit Sharma · Answer

Hi Please update your code as below internal static int lettertonumber( char letter) { int index = char .ToUpper(letter) - 64; return index; } static void Main( string [] args) { int v= lettertonumber( 'd' ); Console.WriteLine(v); Console.ReadLine(); } Hope this will solve your problem.

Nilesh Patil · Answer

Hi Refer this https://stackoverflow.com/questions/1951517/convert-a-to-1-b-to-2-z-to-26-and-then-aa-to-27-ab-to-28-column-indexes-to

Bhuvanesh Mohankumar · Answer

/// /// A -> 1 /// B -> 2 /// C -> 3 /// ... /// /// /// public static int NumberFromString(string column) { int retVal = 0; string col = column.ToUpper(); for ( int iChar = col.Length - 1; iChar >= 0; iChar--) { char colPiece = col[iChar]; int colNum = colPiece - 64; retVal = retVal + colNum * ( int )Math.Pow(26 col.Length - (iChar + 1)); } return retVal; }

Ankit Sharma · Answer

Hi  Please use this code to get your desired output class Program { static void Main( string [] args) { lettertonumber( 'z' ); Console.ReadLine(); } internal static void lettertonumber( char letter) { int index = char .ToUpper(letter) - 64; Console.WriteLine(index); } } Try and let me know if it works for you