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While Loops II

S

Sentinel

Diamond Member
Im not a CS major 😉

need help with
// Output: 1 2 6 24 120 ... (n - 1)!
// First n factorials

heres my bad code

{
int i = 1;
while (i < n){
std::cout << i << ' ';
// take the output and multiply that by the next number
// 1 * 2 = 2, 2 * 3 = 6, 6 * 4 = 24, 24 * 5 = 120
i = ? }
std::cout << i << ' ';
}

and second

// Output: 0 2 1 3 2 4 3 5 4 6 5 7 6 8 7 9 8 10
// Goes up by 2 and then down by 1 alternatively

{
int i = 0;
while (i < n){
std::cout << i << ' ';
i = ?
 
Getting some error message or what do you need help with? Doesn't look like N is defined anywhere on first glance.
 
lol dude first of all .. n^2 does not equal n! . i know you arent' a comp sci major, but that is just plain math that i have known since highschool ...

do nested while loops for the first one.

------------------------
int counter = 1;
int answer = 1;

while (counter != n) {

int timer = counter;

while (timer != 0) {

answer = answer * timer;
timer--;
}

cout << answer << endl;
answer = 1;
counter++;
}
--------------

you can figure out the 2nd one yourself
 
There is a special formula for factorials. It is very handy for programming, but i do not know teh formula off teh top of my head.

for the second,

i=0

do {

cout << i;

i=i+2;

cout << i;

i=i-1;

}while (i<=...whatever)

syntax might be wrong, but that is the idea.
 
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