## Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

# Can Some one explain this to me

int t,s=6; t=(8*s++)%7; System.out.println(t);

``` int t,s=6;
t=(8*s++)%7;
System.out.println(t);
//   t = (8 * 6) % 7 = 6;
//   t = (48) % 7 = 6;
```

s is incremented after the value was passed to the function calling it;
if you want to increment before, use ++s . And use parenthesis around ++s , just as preliminary (pre/post -increment)

But 8 * 6 = 48

And 48%7 = 6.

ok thanks

One last question.

for(int i=1;i<=5;i++) System.out.println(i);

1 2 3 4 5

should'n this also follow the post increament rule eg: when i = 1 and i++ then i = 1

when i = 2 and i++ then i = 2

It is a post increment. // i is incremented at the end of the loop

i = 1;

1 == i++ // true i = 1

1 == i // false i = 2

The for loop, it is divided into 3 parts. the initialization is done first and once only. int i=1;

then the condition is checked, i<=5; Then the program pointer or next execution is the inside of the loop. At the end of the loop, increment: i++

Can you explain to me what is a constructor and why do we need a constructor,I didn't understand it. Also why do we have to initialise our variable in the contructor and not in the class.Sorry I keep saying this is my last question

classes are plans for building objects, and the constructor construct the object. In the C programming language which a lot of programming languages are based on, you have to manage memory yourself. Oop made a lot of things easier. if not specify, default constructor is used.

Because it keeps all initialization in one place. Look up java best practices