Why is the prompt is not shown?

Step 2. Open SciTE from the Terminal.
a. Alternatively, you can also open SciTE from the command line. Click the terminal icon located in the Dock at the bottom. The terminal emulator opens.
b. Type ls to see the contents of the current directory. Notice space.txt is listed. This means you do not have to provide path information to open the file.
c. Type scite space.txt to open SciTE. Note that this will not only launch SciTE in the GUI, but it will also automatically load the space.txt text file that was previously created.

[analyst@secOps ~]$ scite space.txt

d. Notice that while SciTE is open on the foreground, the terminal window used to launch it is still open in the background. In addition, notice that the terminal window used to launch SciTE no longer displays the prompt.
e. Close this instance of SciTE by either clicking the X icon as before, or by switching the focus back to the terminal window that launched SciTE and stopping the process. You can stop the process by pressing CTRL+C.
f. Close SciTE and move on to the next section.

Because the window is running SciTE, and therefore, unable to receive commands.