random randint() randrange()

import

使用前要import random

import random

a <= n <= b，包含b

random.randint(a, b)

a <= n < b ,不包含b

random.randrange(a, b)

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import random

n = random.randint(1, 3)
print(n)
n = random.randint(1, 3)
print(n)
n = random.randint(1, 3)
print(n)

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3

不管執行幾次，都不會有3。

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import random

n = random.randrange(1, 3)
print(n)
n = random.randrange(1, 3)
print(n)
n = random.randrange(1, 3)
print(n)

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