
Problem –
You want to know what variables and functions are defined in your workspace.
Solution –
To list all variables and functions in your workspace, we use the ls() function.
Let’s define some variables and function to illustrate it.
a <- 5
b <- 10
c <- a + b
f <- function(n, p) sqrt(p * (1-p) / n)
Now let;s use the ls() function.
> ls()
[1] "a" "b" "c" "f"
You can also see your variables and functions in the environment pane in RStudio.

If you want more than just a list of names, try the ls.str(). This will also tell you something about each variables.
> ls.str()
a : num 5
b : num 10
c : num 15
f : function (n, p)