tricky for loop

[balajee annamalai]

I need to know why option (a) is working and not option (b) what is the difference?

(a) for(int i=1;i<=1;i++)
    {
   int j=10;
    }
 
(b) for(int i=1;i<=1;i++)
       int j=10;

Can any one please expain this?
[ April 30, 2008: Message edited by: balajee annamalai ]

[Ivan Ivanic]

use a meaningful subject line

[ April 29, 2008: Message edited by: Ivan Ivanic ]

[balajee annamalai]

OK I will use that from now on but can you help me with this question?

[Ivan Ivanic]

try here

[Ben Souther]

Originally posted by balajee annamalai:
OK I will use that from now on but can you help me with this question?

You can always go back and edit your subject line by clicking on the icon in the top post of your thread.

[Nhat Nguyen]

try this:

public class TestFor {

public static void main(String[] args) {
System.out.print("For one: ");
for (int i = 1; i <= 1; i++) {
System.out.println("OK!");
}

System.out.print("For two: ");
for (int i = 1; i <= 1; i++)
System.out.println("OK!");
}
}

[Guido Sautter]

Originally posted by balajee annamalai:
I need to know why option (a) is working and not option (b) what is the difference?

(a) for(int i=1;i<=1;i++)
    {
   int j=10;
    }
 
(b) for(int i=1;i<=1;i++)
       int j=10;

Can any one please expain this?

The difference is that in variant b you have a single line as the body of the for loop, and such a single line body may not declare variables. This is allowed only inside a block enclosed in curly brackets, as in variant a. For such an enclosed block, it does not matter if its only line declares a variable, at least not in terms of a compiler error. You might get a warning, though: "the local variable j is never read".