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(1) Compile and run the applet Add1.java . This program works out 2+2. Make sure that you see the result on the screen. (b) In this program the result of the addition was assigned to a variable called `result'. While this is a sensible name for something that store the result of a calculation, the choice of variable names is entirely at the discretion of the programmer. Modify the program Add1.java, so that the variable is called `fred'. Note that you will have to change more than one line. (c) In (b) I suggested changing the variable name from `result' to `fred'. While this works, why is this a silly thing to do? (d) Enter, and try to run the program ` Add1_bad.java '. It won't work. What is the error message, and what does it mean? (e) Using `Add1.java' as an example, write a Java applet that works out 1234 x 4321. In Java, as in most programming languages, we can't use the letter `x' to mean multiplication (because it might be the name of a variable). So we use an asterisk `*' instead. (f) Using `Add1.java' as an example, write a Java applet that works out 2 / 5 (two divided by 5). Discussion/Suggested solution to Activity 3
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