Question on Enhanced For Loop

[Krishna doddi]

Can somebody explain me with an example how Enhanced For loop works. I tought I understood it well until I came accross this question

int []arr = {1,2,3,4};
for ( int i : arr )
{
   arr[i] = 0;
}
for ( int i : arr )
{
   System.out.println(i);
}

Ans : 0300

I tought there be a Runtime ArrayIndexOutOfBound Exception

Thanks
Siddharth


[HENRY: Added code tags]
[ October 26, 2006: Message edited by: Henry Wong ]

[Henry Wong]

The enhanced for loop will go through the array an set i to each member of the array.

1. On the first iteration, i will be 1, and set arr[1] to 0.
2. On the second iteration, i will be 0 (see step 1), and set arr[0] to 0.
3. On the third iteration, i will be 3, and set arr[3] to 0.
4. On the last iteration, i will be 0 (see step 3), and set arr[0] to 0.

So... final result should be 0030.

Henry

[Krishna doddi]

Thanks Henry,

Your explanation and a Pen and a Paper helped me.

Thanks,
Siddharth