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

• uint64 for bitmap etc.