I know that I can return the index of a particular character of a string with the indexof function but how can I return the character at a particular index

Do you mean like this int index 2 string s hello Console WriteLine s index string also implements IEnumberable lt char gt so you can also enumerate it like this foreach char c in s Console WriteLine c

[c#] How can I get a character in a string by index?

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

See also Substring, to return more than one character.

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