What are Go's basic data types?

Go's basic types are booleans, numbers and strings. The numeric types come in several sizes:

• Signed integers: int, int8, int16, int32, int64
• Unsigned integers: uint, uint8, uint16, uint32, uint64
• Floating point: float32, float64
• Complex numbers: complex64, complex128

Most have a fixed size in their name, but int and uint are either 32 or 64 bits wide, depending on the platform.

A bool holds true or false. A string holds UTF-8 encoded text and cannot change once created. byte is an alias for uint8, used for raw data. rune is an alias for int32 and holds one Unicode code point.

Go never converts numeric types on its own, so mixing int and int64 needs an explicit conversion.