factorial of large numbers

Question

#include<stdio.h>
int main()
{
int a[200],n,counter,temp,i;
a[0]=1;
counter=0;
printf("Enter the number to Find Factorial: ");
scanf("%d",&n);
for(; n>=2; n--)
{
temp=0;
for(i=0; i<=counter; i++)
{
temp=(a[i]*n)+temp;
a[i]=temp%10;
temp=temp/10; //
}
while(temp>0)
{
a[++counter]=temp%10;
temp=temp/10;
}
}
for(i=counter; i>=0; i--)
printf("%d",a[i]);
return 0;
}

how the first for loop and while

Answer 1

Factorial of any large number like 1000,10000 etc in java using BigInteger class

https://code.sololearn.com/c7ZvCIQJZ2am/?ref=app

Answer 2

https://code.sololearn.com/c3eg8MvlATAf/?ref=app
https://code.sololearn.com/cOInw4yJq7wi/?ref=app
https://code.sololearn.com/cE7lXk0wwKMN/?ref=app
https://code.sololearn.com/c4phTP2wUQ3u/?ref=app
https://code.sololearn.com/cOfMIY803RdZ/?ref=app
https://code.sololearn.com/c4Q0rFUFxZIP/?ref=app
https://code.sololearn.com/cj7pAcAEmqTm/?ref=app

Answer 3

Where are you getting wrong?
It is not understandable by me what your doing? So can you specify errors...
For a factorial, these kind of calculations are not necessary...

Answer 4

for loop and while loop forst one

Answer 5

first

Answer 6

If input is 3, then
By for loop you get a[0]=3. And again changing to a[0]=6 by 2nd iteration..
Your code running like this...
If it is 4, then a[0]=4, a[0]=4*3=12, by while loop a[1]=2 output:24

But for a factorial you need just
N*( n-1) *( n-2) *... *1.

Answer 7

it is not mine i am trying to understand it

Answer 8

OK. He is using some different algarithm there...
Write like,
In for loop,
printf("\nin for loop %d,%d,%d",a[i],i,n);
In while,
printf("\nin while loop %d,%d",a[counter],counter);
And make changes, in these according to your understandings..
And run it... You will find what changes are going on...
Hoping it helps you...

Answer 9

https://www.google.com/amp/s/www.geeksforgeeks.org/factorial-large-number/amp/
Better explanation is given in this link. Check ones...