Variables and Assignment Statements

Read this chapter, which covers variables and arithmetic operations and order precedence in Java.

14. Adding a Number to a Variable



Answer:
    quantity holds:  13
The assignment statement replaced the value that was originally in quantity with the value 13.





Adding a Number to a Variable







    





    

    





    
Assume that extra already contains the value 5.





    

        
Extra with 5

    





    
Here is another statement:





    

        
value = extra + 2;

    





    
The statement will be performed in two steps (as always). The first step performs the calculation extra + 2 by first copying the 5 from extra, and then adding 2 to it:





    

        
Do First

    





    
The result of the calculation is 7. The second step puts 7 into the variable value:





    

        
Do Second

    









Question 15:
What will this program print out:
    // Example assignment statements
    int extra, value;

extra = 5;
value = extra + 2;
    System.out.println( "value now holds: " + value );