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C Program for factorial using recursion.
int fact(int);
void main()
{
int a,b=0,c;
clrscr();
printf("Enter the N value:");
scanf("%d",&a);
while(a<0)
{printf("\n\Enter only positive number.\n");
printf("Enter N value:");
scanf("%d",&a);
}
b=fact(a);
printf("%d",b);
getch();
}
int fact(int x)
{
if(x==0)
{
return(1);
}
else
{
return((x)*(fact(x-1)));
}
}
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