Need help before 10pm

MidnightQueen

I'm doing Java in college and i'm stuck on a question that is asking me to Write a program (using a loop) to calculate the product of the even numbers between 1 and 20. Print the result.

I'm stuck and dont know what to do! Help please!!

Sherifu

int result=0;

for(int i=0;i<21;i+=2){

result+=i;

}

//edit forgot to print result

javax.swing.JOptionPane.showMessageDialog(null,result);

RKM.

aidan_walsh

You need to answer these questions to do it.

1) What would th ebest looping structure be?
2) How would I determine if a number is even or not?
3) How would I determine their product?

Try to answer these and the program will practically write itself.

ai ing

rmulryan wrote:

int result=0;

for(int i=0;i<21;i+=2){

result+=i;

}

//edit forgot to print result

javax.swing.JOptionPane.showMessageDialog(null,result);

RKM.

That is just adding the even numbers. you need to get the product as below

int result=1;

for(int i=2;i<=20;i+=2){

result*=i;

Sherifu

that is true, but i'd get most of the marks anyway. :cool:

MidnightQueen

Thanks alot guys!! Very much appreciated!! Rep for all tomorrow cos i'm all outa rep 2day.

amen

I always though the point of this board was to provide help to someone who is stuck on a particular piece of code or requires advice on something not do some ones college/homework assignment when there has been no input/effore made by the poster

aidan_walsh

It is, hence my response... You learn nothing by having all the answers handed to you, always better to be just pointed in the right direction and figure the rest out yourself.

Trojan

Guys, KK in particular, please read the forum charter. It's fine to ask for help here but you should make at least some token effort yourself.