Explain the difference between an express contract and an implied contract

What will be an ideal response?

An express contract is an exchange of oral and written promises between parties which are in fact enforceable in a court of law. An implied (implied-in-fact) contract is established by the conduct of a party rather than by the party's written or spoken words. For example, if you go to the dentist in an emergency and have a tooth extracted, you and the dentist have an implied agreement or contract: She will extract your throbbing tooth in a professional manner, and you will pay her for her services. The existence and content of an implied-in-fact contract are determined by the reasonable person test: Would a reasonable person expect the conduct of these parties to constitute an enforceable contract?