The phrase "How do you do" in Hindi means "आप कैसे हैं" , "नमस्ते", or "नमस्कार". It is a formal way to greet someone and ask how they are doing. It is used as a polite greeting equivalent to "How are you?" in English. Examples:
- How do you do, Madam? — आप कैसे हैं मैडम?
- It can be used to say नमस्ते or नमस्कार when meeting someone.
