v / vlib / math
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1module math


2


3fn test_factorial() {


4    assert factorial(12) == 479001600


5    assert factorial(5) == 120


6    assert factorial(0) == 1


7}


8


9fn test_log_factorial() {


10    assert log_factorial(12) == log(479001600)


11    assert log_factorial(5) == log(120)


12    assert log_factorial(0) == log(1)


13}


14


15fn test_factoriali() {


16    assert factoriali(20) == 2432902008176640000


17    assert factoriali(1) == 1


18    assert factoriali(2) == 2


19    assert factoriali(0) == 1


20    assert factoriali(-2) == 1


21    assert factoriali(1000) == -1


22}