when reaching num value to 1 then the method called again and and again with argument 0 (num-1) then how it is working

Question

namespace SoloLearn
{
class Program
{
static int Fact(int num) {
if (num == 1) {
return 1;
}
return num * Fact(num - 1);
}
static void Main(string[] args)
{
Console.WriteLine(Fact(6));
}
}
}

Answer 1

Try to put the "return num * Fact (num - 1)" into else block.