I have a plant that I don't know the name of.
Could you please help me identify this plant?
It's a Dieffenbachia. The foliage patterns differ, but in the temperate climates, they are very popular house plants. In the tropics, they can be grown outdoors. I see a lot of them in atriums as well. Here are more pictures showing the variety of foliage patterns and colorations.
By the way, one of the common names for this plant is "dumb cane" because the sap can cause numbness and swelling in the mouth and throat if ingested. So watch pets and small kids around it if you have such at home.