在Python里使用if，else，elif工具/原料morePython方法/步骤1/6分步阅读

打开python，这里以Jupyter notebook作为示范，新建一个文档。

2/6

单单只用if，如下：

a = 5

b = 9

if a b:

print (a is bigger than b)

print(a is less than b)

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IF和ELSE一起运用，看起来更容易理解：

c = 6

d = 8

if c d:

print(c is bigger than d)

else:

print(c is less than d)

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IF、ELSE和ELIF三个一起使用，可以增加条件：

e = 10

f = 10

if e f:

print(e is bigger than f)

elif e == f:

print(e is equal to f)

else:

print(e is less than f)

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e如果比f小：

e = 10

f = 13

if e f:

print(e is bigger than f)

elif e == f:

print(e is equal to f)

else:

print(e is less than f)

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e如果比f大：

e = 20

f = 13

if e f:

print(e is bigger than f)

elif e == f:

print(e is equal to f)

else:

print(e is less than f)

注意事项

else后直接跟着冒号，不加其他

PYTHONIFELSEELIF语句