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For loops and arrays are a great way of simplifying your code. Consider the task of displaying which students did better on which test.

Name	Test 1	Test 2
Bert	8	3
Fiona	5	7
Sally	7	6
George	7	7
Fred	5	4

If we stored the values into an array we would end up with 3 arrays -

Array Position	0	1	2	3	Names array 4
Value	Bert	Fiona	Sally	George	Fred

 

Array Position	0	1	2	3	Test1 array 4
Value	8	5	7	7	5

 

Array Position	0	1	2	3	Test2 array 4
Value	3	7	6	7	4

 

To display all of the values we could then write the code -

1. for(int a=0;a<=4; a = a + 1){
2. System.out.println(names[a] + " test 1 = " + test1[a] + " test 2 = " + test2[a]);
3. }

To work out the avearage for test 1 we could do -

1. int sum =0;
2. for (int a=0; a<test1.length; a = a + 1){
3. sum = sum + test1[a];
4. }
5. System.out.println("Average for test 1 = " + sum / test1.length);

Arrays and loops go together like peas in a pod. If you use an array you will most likely use loops. It just goes without saying.

next while loops >>

 

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