IPC aur BNS mein ACTUALLY kya fark hai?

Main socha karta hoon IPC ka matlab hoga law, magar BNS bhi kuch law nahi hai? Kya yeh donon ka kuch common hai? Main socha hoon lagta hai yeh kuch related ho, lekin kaise? Kya aapne BSN ka koi lecture suna hai? Main socha hoon yeh kaafi confusing hai. Bas yeh puchhna hoon. IPC main kya baaton ka definition hai? Kuch examples dekhenge to samajh aayega? Plz help, mera brain kaam karna band kar diya hai.