isn't there a simple straight forward way to create an arc in Adobe Illustrator?

Thank you all, I know that you can do it in other ways, since i am migrating from Corel to AI, i wanted to know if i am missing a simple route. Got my answer. 

In this older thread there is a bit food for thought including sample files. Not quite straightforward, though.

https://community.adobe.com/t5/illustrator/pathfinder-stroke-subtract/m-p/9597843

There is an Arc tool hidden below the Line segment tool, but it is not live and you cannot change it afterwards.

You could make an ellipse and drag the pie handles, then delete the excess, but no, there is no dedicated live arc tool.