yes

The word "haan" is the fundamental way to express agreement or confirmation in Hindi. Imagine it as a gentle nod of the head; it is direct, honest, and serves as the primary building block for positive responses in almost every social situation. While "haan" is perfectly acceptable in daily conversation, it is considered informal. In professional or highly respectful settings, speakers often opt for the more formal "ji haan" or simply "ji" to add a layer of politeness and deference to the listener.
In conversation
Asking for a favor
क्या तुम कल मेरी मदद कर सकते हो?
Can you help me tomorrow?
हाँ, ज़रूर!
Yes, sure!
'Zaroor' adds emphasis to the 'yes'.
Confirming a plan
तो क्या हम सात बजे मिल रहे हैं?
So, are we meeting at seven?
हाँ, पक्का।
Yes, for sure.
Adding 'pakka' confirms the certainty of the agreement.
Examples
हाँ, मैं तैयार हूँ।
Yes, I am ready.
क्या तुम्हें यह पसंद आया? हाँ, बहुत पसंद आया।
Did you like this? Yes, I liked it a lot.
अगर तुम कहो, तो हाँ, हम साथ चल सकते हैं।
If you say so, then yes, we can go together.