Can you whatsapp someone without saving their number

- Can i whatsapp someone without saving their number
- Can you message someone on whatsapp without saving their number
- Can you call someone on whatsapp without saving their number
- Can you text someone on whatsapp without saving their number
- Can you block someone on whatsapp without saving their number
- Can you add someone to a whatsapp group without saving their number
- Whatsapp without save number