printing - How can I print out an constant uint64 in Go using fmt? -


i tried:

fmt.printf("%d", math.maxuint64)

but got following error message:

constant 18446744073709551615 overflows int

how can fix this? thanks!

math.maxuint64 constant, not int64. try instead:

fmt.printf("%d", uint64(num))

the issue here constant untyped. constant assume type depending on context in used. in case, being used interface{} compiler has no way of knowing concrete type want use. integer constants, defaults int. since constant overflows int, compile time error. passing uint64(num), informing compiler want value treated uint64.

note particular constant fit in uint64 , uint. bigger standard int64.


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