Insert
insert( index, subStr )
Inserts string subStr starting at index.
// userText is "Goodbye"
userText.insert(0, "Well "); // Now "Well Goodbye"
// userText is "Goodbye"
userText.insert(4, "---"); // Now "Good---bye"
Inserts string subStr starting at index.
// userText is "Goodbye"
userText.insert(0, "Well "); // Now "Well Goodbye"
// userText is "Goodbye"
userText.insert(4, "---"); // Now "Good---bye"