Post AI6o7zIXyMzI2ytgAa by namark@qoto.org
 (DIR) More posts by namark@qoto.org
 (DIR) Post #AI6o7y1qgy2K6u4pVI by Placholdr@qoto.org
       2022-04-03T21:04:02Z
       
       0 likes, 0 repeats
       
       why 0!=1 tho?
       
 (DIR) Post #AI6o7zIXyMzI2ytgAa by namark@qoto.org
       2022-04-04T14:50:32Z
       
       0 likes, 0 repeats
       
       @Placholdr because 1 is the multiplicative identity and the factorial is a multiplication. If you are in the business of multiplying things you always start with one, not zero, because zero wrecks multiplication. Since you have started with one you multiply nothing with it, you are left with. There is no other meaningful way to define 0!, and even the definition of 1! is dubious with this starting point of 1.