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Println does not take format strings. You're thinking of Printf.

Yup, forgot to edit that :-/

That should be Printf. With Println you get "it's a %T 43". With Printf you get "it's a int"

Are you mixing up Println and Printf?

No, it's correct. It's meant to print "it's a 84".

Would't you expect either "it's 84" or "it's a(n) int|decimal|other_type"?

I figured they ment to do the latter, since the next print function outputs: "it's a string".

Since c is a chan int it can only be an int, no other type. You could directly write fmt.Println("it's an int").

I just tried it, both seem correct as fmt.PrintLn takes multiple inputs