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Optionals
Optional variable types are types that are allowed to contain a
nil values:1
foo: int? = 10
2
foo = nil
3
foo = 100
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Optional types are denoted by a
?We can safely unwrap an optional value, given that it exists, using
!like this:1
foo: str? = maybe_a_str()
2
bar: str = foo!
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Last modified 2yr ago
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