The phrase "attending a function" is correct and usable in written English.
You can use it when referring to participating in an event or gathering, such as a party, meeting, or ceremony.
Example: "I will be attending a function this weekend to celebrate the company's anniversary."
Alternatives: "going to an event" or "participating in a gathering."
Three years ago she raised eyebrows by attending a function with her husband wearing a "bioelectric shield", apparently designed to shield her from harmful electromagnetic radiation.
But the one-day visit took place peacefully and the queen and her husband, Prince Philip, flew out later after attending a function in Belfast.
The keen Arsenal supporter, who lives near the club's Emirates Stadium in Highbury, north London, was last seen after attending a function at the Middle Temple.
The 70-year-old Mr. Pawar was walking toward a staircase after attending a function when the man accosted and slapped him.
The victim, 53, was shot several times early Sunday while he and the other man were attending a function at the post.
Before entering the White House, Eleanor described the future Supreme Court justice Felix Frankfurter as "an interesting little man but very Jew" and, after attending a function for the Wall Street financier Bernard Baruch, complained: "The Jew party was appalling.
Selection was guided by purposive sampling to get insight to experiences of immigrants from Southeast European cultures attending a function-centred rehabilitation program.
Two weeks later, Jama attended a function there to mark the first anniversary of a national television station.
Late in 2007, Woods attended a function at Scotland Yard where colleagues from the US were being entertained.
She told me that after all that, it would mean a lot if we could attend a function for her.
Visit to Bloomerside Pavilion, a few miles out of Brewster, to attend a function known as a callers jamboree-a kind of callers exhibition without prizes.
