Write a program to find the factorial of a number.

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#include<iostream.h>
#include<conio.h>
 int factorial(int );
 void main()
  { int n;
    clrscr();
    cout<<"\nEnter: ";
    cin>>n;
    cout<<"\nFactorial of "<<n<<" is "<<factorial(n)<<".";
    getch();
  }
 int factorial(int n1)
  { int i,f=1;
    for(i=n1;i>=1;i--)
    {  f=f*i;}
    return (f);
  }

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