How to find factorial

Question

#include <iostream>
using namespace std;

int main() {
int num=1;
for(int i=6;i>=1;i++){
i=i*num;
cout<<i;
}
//cout<<i;
return 0;
}

Answer 1

Try the for loop with

i—

Answer 2

Can you please explain it

Answer 3

For the beginning of for loop you set the i to 6. The end of counter you set to 1. Thus you have to count down, what you do with
i—.
Ech time you multipicate num with i and so get factorial.
6! = 6*5*4*3*2*1

Answer 4

Remember your loop syntax:

For(start value; condition; increment)

In your example, you're starting with 6, and have set your condition to activate while i is greater than or equal to 1. You then asked it to add 1 to i each cycle. This means that the value of i will go 6,7,8,9 etc and never satisfy the condition.

If you start at 6 and need to get to 1, i should be counting down.

Amend your loop to:

For(int i = 6; i >= 1; i--)

You also then need to switch your num and I variables in the loop, as you are just repeatedly updating i each loop.

try this:

#include <iostream>
using namespace std;

int main() {
int num=1;
int res{};
for(int i=6;i>=1;i--){
num *= i;
cout<<i << endl;;
}
cout<<num;
return 0;
}

Answer 5

just first try it by yourself , tips -> it need a recursive function

Answer 6

Hi