int-types.md

Choose appropriate integer types

Signed integer

Signed int is used as arithmetic data. Such as size, length, array index etc.

Do not use unsigned int if possible. Minus operation with unsigned int overflows. E.g.:

var a uint32 = 3
var b uint32 = 5

fmt.Println(a - b)
// Output: 4294967294

• int for in-memory size, length.

• int64 for large size, offset etc.

Unsigned integer

Unsigned int is used as non-arithmetic data, such as bitmap, bit mask etc.

• uint64 for bitmap etc.