IPC aur BNS ke beech ka sabse bada difference kya hai?

Main toh abhi tak khush nahi hoon, sab classes mein gaye lekin abhi tak pata nahi laga IPC aur BNS ke beech ka kya difference hai. Sabhi toh yehi kehte hain ki IPC criminal law ka part hai, toh wo kya hai BNS? BNS mein kya topics hai? Aur kya IPC mein BNS se zada topics hai? Main toh abhi tak confused hoon. IPC mein sections ke numbers se to pata chalta hai ki yeh kis chapter ka hai, lekin BNS mein toh kuch bhi nahi samajh raha. Sabhi professor bhaiyya, bas pata bhi na lag raha hai kis topic par baat kar rahe hain.