Default
The default random number generator.
On JVM this generator is thread-safe, its methods can be invoked from multiple threads.
Since Kotlin
1.3Samples
import kotlin.math.sin
import kotlin.random.Random
import kotlin.test.assertTrue
fun main() {
//sampleStart
val randomValues = List(10) { Random.nextInt(0, 100) }
// prints new sequence every time
println(randomValues)
val nextValues = List(10) { Random.nextInt(0, 100) }
println(nextValues)
println("randomValues != nextValues is ${randomValues != nextValues}") // true
//sampleEnd
}Functions
Creates a java.util.Random instance that uses the specified Kotlin Random generator as a randomness source.
Fills the specified byte array with random bytes and returns it.
Creates a byte array of the specified size, filled with random bytes.
Fills a subrange of the specified byte array starting from fromIndex inclusive and ending toIndex exclusive with random bytes.
Gets the next random Double value uniformly distributed between 0 (inclusive) and 1 (exclusive).
Gets the next random non-negative Double from the random number generator less than the specified until bound.
Gets the next random Double from the random number generator in the specified range.
Gets the next random Int from the random number generator.
Gets the next random non-negative Int from the random number generator less than the specified until bound.
Gets the next random Int from the random number generator in the specified range.
Gets the next random Long from the random number generator.
Gets the next random non-negative Long from the random number generator less than the specified until bound.
Gets the next random Long from the random number generator in the specified range.
Creates an unsigned byte array of the specified size, filled with random bytes.
Fills the specified unsigned byte array with random bytes and returns it.
Fills a subrange of the specified UByte array starting from fromIndex inclusive and ending toIndex exclusive with random UBytes.