pkg math/rand, func Int31n(int32) int32
pkg math/rand, func Int63() int64
pkg math/rand, func Int63n(int64) int64
pkg math/rand, func Intn(int) int
pkg math/rand, func New(Source) *Rand
pkg math/rand, func NewSource(int64) Source
pkg math/rand, func NewZipf(*Rand, float64, float64, uint64) *Zipf
pkg math/rand, func NormFloat64() float64
pkg math/rand, func Perm(int) []int
pkg math/rand, func Seed(int64)