#include<iostream>
using namespace std;
int main()
{
int n,i,f=1;
cin>>n;
try
{
if(n>0&&n<20)
{
for(i=1;i<n+1;i++)
f=f*i;
cout<<"Factorial of a given Number is= "<<f;
}
else if(n<0)
throw (0);
if(n>20)
throw(1.0);
}
catch(int i)
{
cout<<"Factorial of a given Number is= "<<i;
}
return 0;
}
using namespace std;
int main()
{
int n,i,f=1;
cin>>n;
try
{
if(n>0&&n<20)
{
for(i=1;i<n+1;i++)
f=f*i;
cout<<"Factorial of a given Number is= "<<f;
}
else if(n<0)
throw (0);
if(n>20)
throw(1.0);
}
catch(int i)
{
cout<<"Factorial of a given Number is= "<<i;
}
return 0;
}
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