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v/vlib/math/factorial_test.v

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V

module math
fn test_factorial() {
assert factorial(12) == 479001600
assert factorial(5) == 120
assert factorial(0) == 1
}
fn test_log_factorial() {
assert log_factorial(12) == log(479001600)
assert log_factorial(5) == log(120)
assert log_factorial(0) == log(1)
}
fn test_factoriali() {
assert factoriali(20) == 2432902008176640000
assert factoriali(1) == 1
assert factoriali(2) == 2
assert factoriali(0) == 1
assert factoriali(-2) == 1
assert factoriali(1000) == -1
}