what is the use of "\"" in the program bellow and why it has 3 double prime sign(")
'string[] strings = { "started", "starting", "ended", "ending" };
string output = "";
for (int i = 0; i < strings.Length; i++)
if (strings[i].StartsWith("st"))
output += "\"" + strings[i] + "\"" + strings[i] + "\"" + "starts with \"st\"\n";
output += "\n";
label1.Text = output;
'
