[Bluej-discuss] For Loop doubt:

[Davin McCall]

Hi Namit,

The difference is demonstrated by the following snippet of code:

int j = 0;
System.out.println("j = " + j);
System.out.println("j = " + ++j);  // pre-increment
System.out.println("j = " + j++); // post-increment
System.out.println("j = " + j);

The post-increment is the most interesting. You will see that it prints 
the value of j as being 1, but the final statement prints a value of 2. 
The key is that j has had one added, but the expression using the 
post-increment still uses the original value of j (the value before the 
increment). For the pre-increment, j is incremented and the incremented 
value is used in the expression.

Davin


Namit TClaw wrote:
>
> I am a student of BlueJ and had a doubt.
>
>  
>
> Is there any difference between :
>
> for(int j=1;j<=5;j++)
>
> System.out.println(j);
>
>  
>
> and
>
>  
>
> for(int j=1;j<=5;++j)
>
> System.out.println(j);
>
>  
>
> The output is the same, but I wanted to know if any internal operation 
> is different.
>
>  
>
>  
>
> Regards,
>
> Namit.
>
>  
>
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>
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