"Nope" and "No" are the same, but you wouldn't use nope in a professional setting. You can use nope in a casual setting like among friends.

Nope and no have same meaning Nope = its slang language, people used it to talk with friends or some informal season No = That's the correct. people use it for formal conversation

"No" is correct English. "Nope" is only spoken informally, often by children and teenagers.

Nope is more oral and casual use...