how to return the character which is at the index?

Question

I know that i could return the index of a particular character of a string with indexof() function. But how i could return the character with the particular index?

Answer 1

string s = "hello";
char c = s[1];
// now c == 'e'

See also Substring, to return more than one character.

Answer 2

Do you mean like this

int index = 2;
string s = "hello";
Console.WriteLine(s[index]);

string also implements IEnumberable<char> so you can also enumerate it like this

foreach (char c in s)
    Console.WriteLine(c);