使用链接的串联和一个空格字符串\“ \”

Question

world = 'World'

hello_world =hello +''+ World
print(hello_world)      # Note: you should print "Hello World"

结果

Traceback (most recent call last):
  /PycharmProjects/Introduction to Python/Strings/Concatenation/concatenation.py", line 4, in <module>
    hello_world =hello +''+ World
NameError: name 'World' is not defined

Process finished with exit code 1

Answer 1

Python变量区分大小写，因此变量World与world不同。

[hello_world =hello +''+ World应该是hello_world = hello + '' + world