<caption><image_46>The image is a black rectangular box with the word "Shell" written in white text on the top left corner. On the right side of the box, there is a blue line connecting two smaller boxes, one labeled "Command" and the other labeled "Shell". The blue line is connected to the two boxes by a thin white line. The background of the image is black.</caption><caption><image_47>The image is a diagram that shows the flow of data from a shell to a command line. The shell is represented by a rectangular box with the word "Shell" written inside it. The command line is connected to the shell by a blue arrow. 

There are two boxes, one labeled "exit" and the other labeled "status". The first box is labeled "command". The second box is labelled "shell", indicating that the shell is the main component of the command line and the status is the exit status.

The background of the image is black, and the text is written in white. The image appears to be a presentation slide or a presentation on a computer screen.</caption><caption><image_48>The image is a slide from a presentation or presentation. It has a dark blue background with white text. On the left side of the slide, there is a text that reads "Exit status" in white letters. Below the text, there are two options - "0" and "non-0". On the right side, it reads "Result Success Failure". The text is written in a bold, sans-serif font and is centered on the slide.</caption><caption><image_49>The image is a slide from a presentation or presentation. It has a dark blue background with white text. On the left side of the slide, there is a title that reads "Exit Status". Below the title, there are two options - "Status 0" and "Non-0". On the right side, it reads "Logical Result". Below these options, it says "True False". The text is written in white and is in a simple, sans-serif font.</caption> something called logical operators which are another kind of conditional statement basically when the shell executes the command it creates a separate process to do so when that process terminates it passes back a piece of information to the shell this piece of information is called an exit status and it's represented by a small integer to allow for logical tests the shell assumes that zero as an exit status means that the process executed successfully a nonzero value says that the process executed but it failed by determining the value of a processes exit status the shell can perform logical tests treating zero as true and non zero as false the shell has two operators for doing this logical or is represented by two two vertical bars or two pipe symbols
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