add while and forever loops

src/rounding.go

@@ -0,0 +1,24 @@
+package main
+
+import "github.com/wadey/go-rounding"
+
+func floor(x number) number {
+
+	n := newNumber().Set(x)
+	if n.Sign() < 0 {
+		return rounding.Round(n, 0, rounding.Up)
+	}
+	return rounding.Round(n, 0, rounding.Down)
+}
+
+func ceil(x number) number {
+	n := newNumber().Set(x)
+	if n.Sign() < 0 {
+		return rounding.Round(n, 0, rounding.Down)
+	}
+	return rounding.Round(n, 0, rounding.Up)
+}
+
+func round(x number, precision int) number {
+	return rounding.Round(newNumber().Set(x), precision, rounding.HalfUp)
+}