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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(username)
  5. print(username.upper())
  6. print(username)
Success #stdin #stdout 0.07s 14076KB
stdin
Standard input is empty
stdout
xiaoming
XIAOMING
xiaoming