Thanks but sorry, I don't understand what you mean by 'cable in the PC'. I have a PC, a charger that I plug into a main socket or adaptor, plus a charger cable that runs from a USB port to the charger
It's all the things that have been mentioned on here already - laptop charger lead or cable. It usually comes as a complete unit - the cable from the wall socket to the adaptor and from there to the laptop. All laptops I've had have a charging port of various sized round pins (not USB). It would help the more technical give you advice if you say why you want to know the name - do you need to buy a replacement?
It's possible to charge phones/IPADs etc FROM the USB socket on a laptop. I think the charger in the question is NOT the charger for the laptop but a charger for another device. If that is the case the lead suggested by ladybirder is the one and it's a USB socket on the laptop.