Chapter 5: Controlling Program Flow with Decision-Making Statements (Php hosting)
Chapter 5: Controlling Program Flow with Decision-Making Statements 103 Figure 5-1: Two runs of the guessing game. The program in Listing 5-1 plays a guessing game with the user. The program gets a number (a guess) from the user and then generates a random number between 1 and 10. If the number that the user entered is the same as the random number, the user wins. Otherwise, the user loses. In either case, the program tells the user what the random number was. She controlled keystrokes from the keyboard Taken together, the lines import java.util.Scanner; Scanner myScanner = new Scanner(System.in); int inputNumber = myScanner.nextInt(); in Listing 5-1 get whatever number the user types on the keyboard. The last of the three lines puts this number into a variable named inputNumber. If these lines look complicated, don t worry. You can copy these lines almost word for word whenever you want to read from the keyboard. Include the first two lines (the importand Scannerlines) just once in your program. Later in your program, wherever the user types an intvalue, include a line with a call to nextInt(as in the last of the preceding three lines of code). Of all the names in these three lines of code, the only two names that I coined myself are inputNumber and myScanner. All the other names are part of Java. So, if I want to be creative, I can write the lines this way: import java.util.Scanner; Scanner readingThingie = new Scanner(System.in); int valueTypedIn = readingThingie.nextInt();
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