const rn … func absInt32(i int32) uint32 { … } // NormFloat64 returns a normally distributed float64 in // the range -math.MaxFloat64 through +math.MaxFloat64 inclusive, // with standard normal distribution (mean = 0, stddev = 1). // To produce a different normal distribution, callers can // adjust the output using: // // sample = NormFloat64() * desiredStdDev + desiredMean func (r *Rand) NormFloat64() float64 { … } var kn … var wn … var fn …