How to make a factorial program in java by taking input from the user?

Question

I am in 8th standard from icse board and my teacher asked me this question and i was not able to make the program so please tell me how to do that.

Answer 1

int fact=1;
for (int a=1;a <=n;a++) {
fact*=a; }
//here n is number entered & fact is n!

Answer 2

public int fact (int n){
if (n==1) return 1;
else n*fact (n-1);} //u forgot n

//@Amrit

Answer 3

One Method is as given by Gaurav.

Another is recursive:

public int fact(int n){
if(n==1)
return(1);
else
return n*(fact(n-1));/*Thanks Gaurav for correcting a mistake*/
}

Answer 4

thanks