Primitives

Type	Notes
bool	true or false. Not an integer; cannot be coerced.
int / int8 / int16 / int32 / int64	signed integers. int is platform-native width (32 or 64 bits).
uint / uint8 / uint16 / uint32 / uint64	unsigned integers.
uintptr	integer wide enough to hold a pointer; rarely needed.
byte	alias for uint8. Used for raw bytes.
rune	alias for int32. A Unicode code point.
float32 / float64	IEEE 754. float64 is the default.
complex64 / complex128	complex numbers; rare outside numerical code.
string	immutable UTF-8 byte sequence.

Variable declarations with explicit primitive types.

var n int = 42
var b byte = 0xff
var r rune = 'A'
var f float64 = 3.14
var s string = "operator"

References

• Strings for the byte vs rune distinction in depth.

• Conversion for crossing between numeric types.