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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)
pkg math/rand, func Uint32() uint32
pkg math/rand, method (*Rand) ExpFloat64() float64
pkg math/rand, method (*Rand) Float32() float32