How do we get this output ?

[Mohnish Khiani]

class exp
{
public static void main(String a[])
{
int j=0;
for(int i=0;i<10;i++)
{
j=j++;
}
System.out.println(j);
}
}

Output : 0
How do we get output as 0?

[Hunter McMillen]

j++ means that the value of j will increase by 1 after the statement is processed.

So when you do:

j = j++

You are really doing:

j = 0++

So j gets assigned 0, THEN the value on the right hand side turns into 1, but at that point it doesnt matter because the loop executes again and the right hand side is lost.

try this:

class exp
{
public static void main(String a[])
{
int j=0;
for(int i=0;i<10;i++)
{
j=++j;
}
System.out.println(j);
}
}

[Jesper de Jong]

See the following page in our FAQ: Post Increment Operator And Assignment

[Campbell Ritchie]

Please search this forum for "postincrement" and "preincrement" because lots of people get confused about this very same question and there are frequent posts about it.

[Maneesh Godbole]

Just for fun, change
j=++j;
to
j+=1;

[Wouter Oet]

or just to j++;