4)Write a program to find factorial value using function.

 void fact(int n)
{
int f=1;
for(;n>0;n--)
f=f*n;

printf(" factorial value: %d ",f);
}
void main()
{
int n,f;
clrscr();
printf(" enter any no: \n");
scanf("%d",&n);
fact(n);
getch();
}

output:

enter any no: 5

factorial value: 120