You say of course to suggest that something is normal, obvious, or well-known, and should therefore not surprise the person you are talking to. [spoken]

sure (adjective) sure (adverb) sure–handed (adjective) be (verb) enough (adverb)

adjective, sur·er, sur·est. confident, as of something expected: sure of success. convinced, fully persuaded, or positive: to be sure of a person’s guilt. assured or certain beyond question: a sure victory.

In the United States, in a mid-Western regional colloquial usage, or “in the countryside” in general (as in anywhere in the U.S. that is non-urban), the expression “sure thing” can replace “you’re welcome”. This is very casual usage though.

10 English Phrases for Responding to “Thank You”

• You’re welcome.
• No problem.
• No worries.
• Don’t mention it.
• My pleasure.
• Anytime.
• It was the least I could do.
• Glad to help.

Here are a few more ways to say “You’re welcome” in English.

• You got it.
• Don’t mention it.
• No worries.
• Not a problem.
• My pleasure.
• It was nothing.
• I’m happy to help.
• Not at all.

Yep is a popular slang word used to answer in the affirmative to a question. It is a common alternative to “yes” but more playful. Yep is typically used in casual situations between friends and family members.

Yep. Yes is not a formal word; you can use it in both formal and informal contexts. Looking at the definitions given for yeah, yeh, yep, or yup, all those words are defined as exclamation & noun nonstandard spelling of yes, representing informal pronunciation.

As nouns the difference between yup and yep is that yup is (informal) a yes; an affirmative answer while yep is (informal) yes.

One word answers are considered rude because they are often dismissive, as if you can’t be bothered with the person or the question. For example, someone may ask, “Did you have fun today?” They don’t want a simple yes or no. They also want to hear why.

Yes

Yep. And then we have “yup,” another casual way of saying yes. The American Heritage Dictionary says that “yup” is an alteration of “yep.” So one alteration of “yes” has its own alteration.

convention. Yep means yes. [informal, spoken]