
The charAt method returns the character at a particular index in a String.
One of the uses of this method is for extracting just the first character of a
String, which might be advantageous when prompting the user for an
answer to a question. For example, we might ask users if they want to play
again. They can answer “y,”“yes,” or “you bet!”
Our only concern is whether the first character is a y, so we could use this
method to put the first character of their answer into a char variable.
Assuming the user’s answer was previously assigned to a String variable
named answerString, we would use the following statement to extract the
first character of