Single-branch if

The "cookie problem" is about whether to do something extra. The choice is about whether to add a visit to the cookie shop to your shopping trip. The following program aids the shopper in this decision. The user of the program rates various factors on a scale of 1 to 10. If the combination of hunger, aroma, and visual appeal of the cookie exceed a threshold of 15, the program recommends a purchase.

import java.util.Scanner ;
class CookieDecision
{
  public static void main (String[] args) 
  {
    Scanner scan = new Scanner( System.in );
    int hunger, look, smell ;

    System.out.print("How hungry are you             (1-10): ");
    hunger = scan.nextInt();

    System.out.print("How nice does the cookie look  (1-10): ");
    look   = scan.nextInt();

    System.out.print("How nice does the cookie smell (1-10): ");
    smell  = scan.nextInt();

    if ( (hunger + look + smell ) > 15 )
      System.out.println("Buy the cookie!"  );

    System.out.println("Continue down the Mall.");
  }
}

This is like the decisions of the previous chapter, but now there is only a true branch.

• The if statment always asks a question (usually comparing numbers).
• If the answer is true the true branch is executed.
• If the answer is false the true branch is skipped.
• In both cases, execution continues with the statement after the true branch.
• The true branch may be a block statement: several statements enclosed in braces { and }.