Predicting the Outcome without a compiler **Not a Homework Question**

**sternfox** · February 25th, 2013, 04:34 PM

I am trying to understand the out come of the following problem:

public class Whatever {
    public static void main(String[] args) {
 
 for(int i = 1; i < 5; i++) {
 
            for(int j = 1; j < i; j++) {
 
                    System.out.print(i + ",");
                }
            System.out.println();
                }    
        }
}

I understand the concept of j = 1 and i = 1 and how the output will be the following:
2,
3,3,
4,4,4,

what I don't understand is if I change j = 0 and leave i = 0 the result is the following:
1,
2,2,
3,3,3,
4,4,4,4,

can someone please explain why this occurs?

Thank you in advance,

**Norm** · February 25th, 2013, 04:53 PM

Play computer with the code. Evaluate each statement using the current value of the variables. Do the statements one by one. Use paper and pencil to keep track of the values of variables.
If you have a question about a statement, post the question and the values of the variables used in that statement when the statement is executed.

Review how for loops work.
http://docs.oracle.com/javase/tutori...bolts/for.html

Thread: Predicting the Outcome without a compiler Not a Homework Question

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