# Factorial of Large Number in C and C++

Here you will get the program to discover factorial of an enormous number in C and C++.

Factorial of huge numbers contain such a large number of digits. For instance factorial of 100 has just about 158 digits.

So there is no information type accessible to store such a long worth. Yet, we can discover factorial for enormous numbers utilizing basic augmentation

technique that we utilized in our educational time. Underneath I have shared the program for it.

Program for Factorial of Large Number in C

``````#include<stdio.h>

int multiply(int x,int a[],int size)
{
int carry=0,i,p;

for(i=0;i<size;++i)
{
p=a[i]*x+carry;
a[i]=p%10;
carry=p/10;
}

while(carry!=0)
{
a[size]=carry%10;
carry=carry/10;
size++;
}
return size;
}

int main()
{
int n,a,i,size=1;
a=1;

printf("Enter any large number:");
scanf("%d",&n);

for(i=2;i<=n;++i) {
size=multiply(i,a,size);
}

for(i=size-1;i>=0;--i)
{
printf("%d",a[i]);
}

return 0;
}``````

Program for Factorial of Large Number in C++

``````#include<iostream>

using namespace std;

int multiply(int x,int a[],int size)
{
int carry=0,i,p;

for(i=0;i<size;++i)
{
p=a[i]*x+carry;
a[i]=p%10;
carry=p/10;
}

while(carry!=0)
{
a[size]=carry%10;
carry=carry/10;
size++;
}
return size;
}

int main()
{
int n,a,i,size=1;
a=1;

cout<<"Enter any large number:";
cin>>n;

for(i=2;i<=n;++i) {
size=multiply(i,a,size);
}

for(i=size-1;i>=0;--i)
{
cout<<a[i];
}

return 0;
}``````

Output

On the off chance that you have any uncertainty in regards to the

above program, at that point, you can ask it by remarking beneath.