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  1. for i in range(4):
  2. print(f"outer: {i}")
  3. for i in range(4):
  4. print(f" inner: {i}")
  5.  
Success #stdin #stdout 0.02s 9072KB
stdin
Standard input is empty
stdout
outer: 0
  inner: 0
  inner: 1
  inner: 2
  inner: 3
outer: 1
  inner: 0
  inner: 1
  inner: 2
  inner: 3
outer: 2
  inner: 0
  inner: 1
  inner: 2
  inner: 3
outer: 3
  inner: 0
  inner: 1
  inner: 2
  inner: 3