Replacing for with while loop.

[supercowy]

Hey there,

I am currently attending my first year of computer programming languages and I have my first tests in a few weeks. My teacher gave me an example of exercises we can expect on our test.
One of the test exercises is this:

   public void testWhileLoop(int limit)
    {
        int i = 1;
        while ( i <= limit ) {
            // Print a number of '*' characters
            for (int j=0; j<i; j++) {
                System.out.print("*");
            }
            // Print a 'newline' character
            System.out.print("\n"); 
            i++;
        }
    }

I got this piece of code. And now I have to replace the while loop with the for loop, and the for loop with the while loop. So basically turn those 2 arround.
Basically what this code does is: It asks the user for an input int. And say for example the user inputs 4. This code outputs:
*
**
***
****

Can you guys help me?

Thanks in advance!

[ballantony]

Here's a suggestion to get you started

Why not replace the while loop with a for loop first, and see if you can get the code to run properly. Think about what the i++ does.

After that try and change the while loop

[supercowy]

I tried to replace the loop but I just couldn't get a working solution. I kept getting endless loops or unwanted results. Could anyone help me a bit more on this one? Shouldn't be too much of a problem for
experienced java programmers I guess.

[acmohan]

Its simple u can try.jst check the limit condition in for and no of time you need "*" in inside while.

[JosAH]

If you look at your code from a great distance, you see something like this:

int i= 1;
while (i <= limit) {
   // here is code that uses, but doesn't change, variable i
   i++;
}

I doesn't take rocket science to change the code to:

for (int i= 1; i <= limit; i++) {
   // here is code that uses, but doesn't change, variable i
}

You can apply the same logic (but all reversed) to change your inner loop.

kind regards,

Jos