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Java Java Objects Creating the MVP Prompting for Guesses

why did we make a new variable for the charAt(0) method

why we used this line: char guessInput = scanner.nextLine().charAt(0); instead of these two lines: char guessInput = scanner.nextLine(); char guess = guessInput.charAt(0); I try it and it works. what is the difference?

2 Answers

You can eliminate intermediate variables with method chaining. Because this technique wasn't covered two lines of code were used instead.

ok thanks

The two lines and the one line solutions give the same result, but with the two lines solution we are allocating an additional variable that we can eliminate since it is used only once to give us another value, allocating a variable means allocating memory and additional reference that we don't really need and we can ultimately avoid via method chaining.