Code:
GiaiThua1[n_] := If[n == 0 || n == 1,
Return[1];
,
Return[n*GiaiThua1[n - 1]];
];
Code:
GiaiThua2[n_] := Module[{},
If[n == 0 || n == 1,
Return[1];
,
Return[n GiaiThua2[n - 1]];
];
];
Code:
GiaiThua3[n_] := Block[{},
If[n == 0 || n == 1,
Return[1];
,
Return[n GiaiThua3[n - 1]];
];
];