Kotlin Programming: The Big Nerd Ranch Guide, 2nd Edition

For the More Curious: Unsigned Numbers

Kotlin 1.5 introduced unsigned numeric types as a stable language feature. They are very similar to the numeric types you have seen so far, except that they cannot express negative values. Table 5.2 shows the unsigned numeric types available in Kotlin.

Table 5.2  Unsigned numeric types in Kotlin

Type	Bits	Max Value	Min Value
UByte	8	255	0
UShort	16	65,535	0
UInt	32	4,294,967,295	0
ULong	64	18,446,744,073,709,551,615	0

There are similarities and differences between these unsigned numeric types and the signed numeric types introduced earlier in this chapter. For one thing, the floating-point numeric types – Float and Double – have no unsigned counterparts. We ...