如何在Java中将此while循环转换为for循环？

Question

given:

int counter = 10;

while (counter > 0)
{

    System.out.println(counter);
    counter = counter - 1;
}

So far I have:

for (int i = 0, i < 10, i --){

    int counter = 10
    System.out.println(counter)
}

I don't think that's correct but I can't quite get it. Any help would be great. Thanks

Answer 1

for (int counter = 10; counter > 0; counter--) {
     System.out.println(counter);
}

Creating two integer variables is unnecessary, lets simply use counter in the loop and printing.

Answer 2

Your loop has three parts:

• initializing the index
• testing the index
• 'stepping' the index

For the while loop these are:

• counter = 10
• counter > 0
• counter = counter - 1

For a for loop we have for (initialize, test, step) { ... }`

So substitute the while loop parts into a for loop an you will have your answer.