A character is 1 letter, number, or symbol inside apostrophes.
Code:
new string[12];
copy(string, 11, "lolstring");
/*
string[0] = 'l'
string[1] = 'o'
...
each slot of string[] (except the last one) contains a character
*/
client_print(0, print_chat, "%s - %c%c%c", string, string[0], string[1], string[2]);
// Result: "lolstring - lol"
//You can also set variables as characters (for whatever reason you may have).
new lolstring = 'Q';
client_print(0, print_chat, "%c", lolstring);
// Result: "Q"
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