Write a recursive method to compute the factorial of a number.
What will be an ideal response?
```
public static int factorial(int n)
{
if(n < 0)
{
System.out.println(“Sorry negative numbers not allowed.”);
System.exit(0);
}
if(n == 1) //base case
return(1);
else
return (n * factorial(n-1));
}
```
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