Chapter 5: Controlling Program Flow with Decision-Making Statements (Web hosting service)
Chapter 5: Controlling Program Flow with Decision-Making Statements 109 Figure 5-3: Two runs of the game in Listing 5-2. Listing 5-2 illustrates another new idea. With an importdeclaration for System.in, I can reduce new Scanner(System.in)to the shorter new Scanner(in). Adding this importdeclaration is hardly worth the effort. In fact, I do more typing with the importdeclaration than without it. Nevertheless, the code in Listing 5-2 demonstrates that it s possible to import System.in. Forming Conditions with Comparisons and Logical Operators The Java programming language has plenty of little squiggles and doodads for your various condition-forming needs. This section tells you all about them. Comparing numbers; comparing characters Table 5-1 shows you the operators that you can use to compare one thing with another. Table 5-1 Comparison Operators Operator Symbol Meaning Example == is equal to numberOfCows == 5 != is not equal to buttonClicked != panicButton < is less than numberOfCows < 5 > is greater than myInitial > B <= is less than or equal to numberOfCows <= 5 >= is greater than or equal to myInitial >= B
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