<caption><image_37>The image is a screenshot of a text message on a computer screen. The background of the screen is black and the text is written in white. The text reads "No arguments: Print usage message. One argument: Search for pattern. Two or more: Print an error message." The text is in a bold, sans-serif font and is centered on the screen.</caption><caption><image_38>The image is a slide from a presentation or presentation. It has a dark blue background with white text in the center that reads "Conditional Statement". The text is written in a bold, sans-serif font and is centered on the slide. The slide appears to be a title or description of a statement.</caption><caption><image_39>The image is a screenshot from a video interview. It shows a man standing in front of a white wall with a painting hanging on it. He is wearing a white collared shirt and a maroon tie. He has a beard and is looking directly at the camera with a serious expression on his face. The image appears to be taken in a room with a plant and a painting on the wall behind him.</caption><caption><image_40>The image is a screenshot of a computer screen with a blue background. On the screen, there is a text written in white font that reads "case $ = in". Below the text, there are three options - "0", "print usage message", and "search for pattern". 

The first option is "print error message", followed by "esc". This option is used to search for a pattern in a code. The second option is also used to print the error message. The third option is called "escac". The text is written in a simple, sans-serif font and is centered on the screen.</caption> problem with pH fine was that a user could enter no arguments or too many arguments and pH find wouldn't execute properly to solve this problem we have to have a way to execute different commands depending on how many arguments the user puts on the command line if the user puts no arguments on the command line we have to do one thing if the user puts one argument on the command line then we search for that argument in the phone list if the user has two or more arguments on the command line then we have print out an error message or at least tell the user that we can only search for one pattern at a time in programming we call this kind of construct a conditional statement because based upon a condition we will execute one of several commands one of the shells conditional statements is called the case statement and that's the one we're going to cover in this section the case statement works by matching patterns between a target string that you identify in a series of patterns that identify the statement you wish to execute in this example we wish to execute different commands based on the number of arguments on the command line recall that the shell tells us how many arguments were on the command line in the variable dollar pound sign I can use this as my conditional indicator to identify which command line to execute this graphic shows a prototype of the
{"source": "grass-yt-cc-by.1WC2nTfUVqg|shard_100|create_multimodal_data.extract_yt_and_generate_transcripts.48|shard_100|create_multimodal_data.generate_captions.48", "params": {"id": "1WC2nTfUVqg", "channel_id": "UCCi5cj3gQeb7hhs31xUN1tQ", "duration": 4072, "view_count": 93, "age_limit": 0, "like_count": 0, "channel_follower_count": 1040, "license": "Creative Commons Attribution license (reuse allowed)", "uploader_id": "@mieb-wiedaschaun", "yt_tar_file": "/leonardo_work/EUHPC_E03_068/audio/fixed_download/grass-yt-cc-by//shard_100/1WC2nTfUVqg.tar.gz"}}