kotlin-stdlib / kotlin.text / toUIntOrNull toUIntOrNull Common JVM JS Native 1.3 @ExperimentalUnsignedTypes fun String.toUIntOrNull(): UInt? Parses the string as an UInt number and returns the result or null if the string is not a valid representation of a number. Common JVM JS Native 1.3 @ExperimentalUnsignedTypes fun String.toUIntOrNull( radix: Int): UInt? Parses the string as an UInt number and returns the result or null if the string is not a valid representation of a number. Exceptions IllegalArgumentException - when radix is not a valid radix for string to number conversion.