1: Optional("100") 2: Optional(" 100") 3: Optional(" 100") 4: Optional(" 100") 5: Optional("100 ") 6: Optional("100 ")stderr:

<stdin>:5:13: warning: expression implicitly coerced from 'String?' to 'Any' print("1:", formatter.string(from: 100)) // Optional("100") ^~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:5:23: note: provide a default value to avoid this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:5:23: note: force-unwrap the value to avoid this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ! <stdin>:5:23: note: explicitly cast to 'Any' with 'as Any' to silence this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ as Any <stdin>:8:13: warning: expression implicitly coerced from 'String?' to 'Any' print("2:", formatter.string(from: 100)) // Optional(" 100") ^~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:8:23: note: provide a default value to avoid this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:8:23: note: force-unwrap the value to avoid this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ! <stdin>:8:23: note: explicitly cast to 'Any' with 'as Any' to silence this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ as Any <stdin>:11:13: warning: expression implicitly coerced from 'String?' to 'Any' print("3:", formatter.string(from: 100)) // Optional(" 100") ^~~~~

(edited)

stderr.txt

https://file.io/F1Rd3qBJ7haw