Add random.go

random.go

@@ -0,0 +1,21 @@
+package q5
+
+import (
+	"math/rand"
+	"strings"
+)
+
+// RandomString generates a random string of length n
+const alphabet = "abcdefghijklmnopqrstuvwxyz"
+
+func RandomString(n int) string {
+	var sb strings.Builder
+	k := len(alphabet)
+
+	for i := 0; i < n; i++ {
+		c := alphabet[rand.Intn(k)]
+		sb.WriteByte(c)
+	}
+
+	return sb.String()
+}