IPC aur BNS mein ACTUALLY kya fark hai?

Yaar samajh nahi aaya, Contract Law mein jo kuchh padha ja raha hai. IPC (Indian Penal Code) aur BNS (British Negotiable Instruments Act) mein kya differences hai? Both don'th make seem related, but sab kuchh padhne ke liye, mujhe lagta hai ki unka ek connection hai jo mere brain ko confuse kar ja raha hai. Jaise, Promissory Note, chehra IPS mein bhi aata hai, aur BNS mein bhi. Aur then, jo cases padhte hain, IPS kya hai, IPS kya nahi hai, IPS ka kya difference hai BNS se... please help mujhe samajh aaya!