Something is fishy out here..

[sonir shah]

What will the following program print?

class Test 
{ 
public static void main(String args[]) 
{ 
int i=0, j=0; 
X1: for(i = 0; i < 3; i++)
{
X2: for(j = 3; j > 0; j--)
{
if(i < j) continue X1;
else break X2;

}
}
System.out.println(i+" "+j); 
}
}

Options :
1)0 3
2)0 2
3)3 0
4)3 3
5)2 2
Answer : 4)3 3
My question is i<3, so how can 'i' ever reach to value 3 in the output
Sonir

[Anonymous]

 
class Test { 
public static void main(String args[]) { int i=0, j=0;
 X1: for(i = 0; i < 3; i++){
                X2: for(j = 3; j > 0; j--)
{
                 if(i < j) continue X1;     else break X2;}
        }
         System.out.println(i+" "+j); 
}
}

well the above code will iterate
i = 0, j = 3 and then continue called
i = 1, j = 3 and then continue called
i =2, j = 3 and then continue called
and then i = 3 then compared to i > 3
( Is 3 > 3 ) will return false
So code will print
i = 3 & j = 3
Hope this helps!!!

[sonir shah]

Amish,

and then i = 3 then compared to i > 3

but i<3, so how can i ever reach 3???
Sonir

[Anonymous]

Sonir
Sorry I meant ( Is 3 < 3 ) will return false
The value of i does reach 3 and at 3 your outer exits. Think of for loop like this

first do the comparison
then execute your block
& at the end do the increement

for e.g.
int i = 0;
for ( i = 1; i < 3; i++; )
{
}
before even u execuet the for loop u would do the intialization
which is i = 1;
Iteration 1
then you would do the comparison

[Anonymous]

Sonir
Sorry I meant ( Is 3 < 3 ) will return false
The value of i does reach 3 and at 3 your outer exits. Think of for loop like this

first do the comparison
then execute your block
& at the end do the increement

for e.g.
int i = 0;
for ( i = 1; i < 3; i++; )
{
// body of the loop
}
before even u execuet the for loop u would do the intialization
which is i = 1;
you would do the comparison
execute the body of the loop
then increment your i
again do the comparison
execute the body of the loop
then increment your i
The important thing to remember is that in a for loop the increment occurs after the body of the loop executes.
Hope this helps