For loops

[cool dude]

can someone please tell me what the difference is between doing it these 2 ways? because the first way doesn't work and i don't see much of a difference

code:

public class listnums1 {         public static void listnums1(int max){           int i = 0;           for (i; i<=max; i++){               System.out.println("Number: " + i);            } } }

Or the correct way

code:

{         public static void listnums1(int max){           for (int i = 0; i<=max; i++){               System.out.println("Number: " + i);            } } }

[Tony]

well because it's like

for ( declare local? variable; condition; some operation)

so placing i where variable declaration is expected instead is wrong

I think that

code:

int i = 0;      for (; i<=max; i++){

might work, it should in C

just be careful about your counter's scope

[rizzix]

cool dude wrote:

code:

public class listnums1 {         public static void listnums1(int max){           int i = 0;           for (i; i<=max; i++){               System.out.println("Number: " + i);            } } }

The first part of the for-loop has to be either an initialization or an assignment. Your code clearly breaks that rule.

Maybe you meant this:

code:

public class listnums1 {         public static void listnums1(int max){           int i;           for (i = 0; i<=max; i++){               System.out.println("Number: " + i);            }     } }

[cool dude]

so this is one of those pointless rules. i don't really see much of a difference in declaring a variables and then making the counted/for loop with it. thanks for explaining

P.S. how would you draw shapes in java?

[[Gandalf]]

cool dude wrote:

P.S. how would you draw shapes in java?

You create either an applet or a Frame, JFrame, or some other kind of GUI container, and use the paint() method using the Graphics class.

[rizzix]

cool dude wrote:

so this is one of those pointless rules. i don't really see much of a difference in declaring a variables and then making the counted/for loop with it.

It's not really a pointless rule. It is a rule.

If you wish you may also write that snippet as follows:

code:

public class listnums1 {    public static void listnums1(int max){      int i = 0;      for (; i<=max; i++){          System.out.println("Number: " + i);       } }

See the difference?...