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How to find factorial
#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; }
6 Answers
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Try the for loop with
iâ
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Can you please explain it
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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
iâ.
Ech time you multipicate num with i and so get factorial.
6! = 6*5*4*3*2*1
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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;
}
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just first try it by yourself , tips -> it need a recursive function
0
Hi