Example 1:
> print("Hello world") > "myfile.txt";
> t = readfile("myfile.txt");
> t;
Hello world
Example 2:
> verbosity=1!;
> readfile("afile.txt");
Warning: the file "afile.txt" could not be opened for reading.
Warning: at least one of the given expressions or a subexpression is not correctly typed
or its evaluation has failed because of some error on a side-effect.
error