Using the
output statement println with variables is
straightforward. To display the value
of a variable, we just need to place the variable name between the
parentheses, but not inside quotes (putting it in quotes will treat it as a
string so its name will be displayed instead of its value). As before, we can use the + operator to
attach multiple items that we’d like to display. Here’s a program that puts everything together: public class Farm { public static void main(String[] args) { int chickens = 10; System.out.println(“I had “ + chickens + “ chickens.”); System.out.println(“Some weeks later...”); chickens = 20; System.out.println(“The number grew to “ +
chickens + “ chickens.”); } } Compile and
run this program and you should obtain the following output: I
had 10 chickens. Some
weeks later... The
number grew to 20 chickens. Notice how
in both println statements,
when we put chickens in quotes, the word chickens was
displayed, whereas without the quotes, the current value of the
variable chickens
was displayed. When the
first println executes the value of chickens is 10, but when the second executes, the variable has already
changed to 20, so 20 will be displayed.
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