Method code won't work for capitalization

Question

Hi! I am doing a code for method that will capitalize every other word in an input, however my code below does not work and I can not find the reason. Can someone pls help?

static string ToMixed (string input)

{

string output = "";

for (int i = 0; i < input.Length; i++)

{

if(i %2 == 0)

{

output = output + input[i].ToLower();

}

else

{

output = output + input[i].ToUpper();

}

}

return output;

}

static void Main(string[] args)

{

Console.Write("Write a word: ");

string input = Console.ReadLine();

string result = ToMixed(input);

Console.WriteLine(result);

Console.ReadKey();

}

The only clue ive got is in error message: No overload for method 'ToUpper (and 'ToLower') takes 0 arguments. I dont know what they mean

Answer 1

That error message means that there is no version of toUpper and toLower that takes 0 arguments so you are essentially calling a method that doesn't exist.

The toLower() and toUpper() methods you are trying to use are string methods.

Although input is a string, input[i] is a character.

The equivalent methods for Char have 1 parameter and are called as follows:

Char.toLower(input[i])

Char.toUpper(input[i])