Difference between '::UInt64' and '::Type(UInt64)'

[fatteneder]

@jiang_ming_zhang

For ‘::UInt64’, I know I need to input an unsigned integer with 64 bits, but what should I input for ‘::Type(UInt64)’?

You put UInt64. Example:

julia> f(x::UInt64) = 1
f (generic function with 1 methods)

julia> f(x::Type{UInt64}) = 2
f (generic function with 2 methods)

julia> f(UInt64(5))
1

julia> f(UInt64)
2