Julia High Performance - Second Edition

Unsigned integers

The basic integers described previously are all signed values, in that numbers greater and less than zero are stored separately. Unsigned integers can be stored using the UInt64 and UInt32 types. As with many other Julia types, the type conversions can be done via constructors, as follows:

julia> UInt64(1)0x0000000000000001

Unsigned integers can be created as literals when written in hexadecimal or binary form; for example, 0x9E or 0b10011001, respectively.

These conversions check for out-of-range values. They throw an error when trying to convert a value that does not fit in the resulting type, as follows:

julia> UInt32(4294967297)ERROR: InexactError: trunc(UInt32, 4294967297)Stacktrace:....

The conditional check will have ...