Why do I get errors on Optional variable declaration?

Question

var s: Int? = 12

print(s)

I get like 5 errors back and no output. But removing the `?`, I get fully functioning code.

test1.swift:3:7: warning: expression implicitly coerced from 'Int?' to Any
print(s)
^
test1.swift:3:7: note: provide a default value to avoid this warning
print(s)
^
?? <#default value#>
test1.swift:3:7: note: force-unwrap the value to avoid this warning
print(s)
^
!
test1.swift:3:7: note: explicitly cast to Any with 'as Any' to silence this warning
print(s)
^
as Any
Optional(12)

Answer 1

Hello! You are not actually getting any errors. You are simply getting warnings from the compiler that the calue that your are printing out to the console is optional so you should unwrap it. Either you bang it, or you do it the safer way by either using if-let, guard-let or nil coalescing