Question

Can anyone help please!! Racking my brain and can't figure out..?
I need to know how to convert a nested for loop into a nested while loop to create an output that shows numbers 1-12 and their factorial. I know how to do it using two for loops. But I can't figure out how to do it using a for loop & a while loop?

Answer 1

when I write it with two for loops it works fine. (below)
int i, j;
int num;

for (i= 1; i <=12; i++)
num=1;
for (j=1; j<=i ; j++)
num = num * j;

cout << i << "Is" << num << endl;

Answer 2

a while loop goes on while a condition is true.
```
int i = 0;
while i < 12{
i++;
cout << "i is " << i << endl;
}
```

Oh, and puting ``` above and below a code block causes the code quoting system to turn on. (That is the one with the ~ on the key.)

Answer 3

thank you for the help.

Answer 4

Another thing people sometimes do is make a flag.

bool flag = true;
while (flag) {
do some work
some if thing to see if you need to set flag to false
more work
another if thing to see if you need to set flag to false
}

As shown, this is most useful when more than one thing may need to change the flag to false.

Answer 5

well, I was just trying to change the inner for loop into a while loop, and kept failing. but i'll try this. Can I keep the first outer for loop the same though?...

Answer 6

yes. You can do either one or both using these sorts of methods.

You can also use a do while loop, which is a little more like a for.

do{
bla bla
} while (condition);

This has the advantage that it always happens one, which is more like a for, but takes a little more typing (not much).

Answer 7

great. thank you !

Answer 8

have fun

Answer 9

Thank you again. The code worked great. ! You guys are such a big help. thank you