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  1. username="xiaoming"
  2. age=18
  3. hello=f'我的名字叫{username},今年{age}岁'
  4. print(hello)
  5.  
  6. print(username. upper())
  7. print(len(username))
Success #stdin #stdout 0.1s 14196KB
stdin
Standard input is empty
stdout
我的名字叫xiaoming,今年18岁
XIAOMING
8