Help with searching for a specific input filetype within a directory

I am trying to create a function that inputs a filetype and directory name and outputs a cell array of the images. If line 9 is written as;

imageNames = dir(filetype) and filetype = '*.jpeg' it will work.

However, the input for filetype can only be '.jpeg' (tasked constraint)

How can i fix this?

Answer 1

[Stephen23]

F = '.jpeg'
S = dir(['*',F])

[t4741]

Thank you!