func math.Floor

5 uses

	math (current package)
		floor.go#L14: func Floor(x float64) float64 {
		floor.go#L51: 	return -Floor(-x)
		gamma.go#L146: 	p := Floor(q)
		lgamma.go#L335: 	z := Floor(x)

	math/rand
		zipf.go#L68: 		k = math.Floor(x + 0.5)