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To show wild cards in action I will firstly use them for some Linux commands.

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But firstly we need to create some files for practicing so we will create certain text and so the image

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files

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for creating City files I will use for loop as if we didn't cover this topic yet.

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Just type in the same as me and we'll explain it more deeply in a separate section.

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But basically I am here sometimes Times looping.

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And inside each flow I am creating a file ending with a number of between one to serve the and same

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also for image

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using a command.

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We can see that we have created some text and cirrhotic image files.

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So now let's make some wildcards

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let's say that we want to list files ending with 8:59 don't text.

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So file one file two files three up to file nine dot for these values range inside square brackets.

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So type out as file square brick get 1 Dash 9 end of square bracket dot text

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and we can see that it lists file one file to up to file nine dot text.

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Now let's make it more difficult and the list files ending with 8:59 for both text and image extension.

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We are starting with the same class file square Brigade one dish 9 and it's end of square.

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Don't.

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But now we need to say Do this for text and image extension and we are doing it using curly brackets

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comma separated Dharam we can see that it lists file one file to up to 5 9 for boat extensions.

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Great.

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Let's move on something more difficult.

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Lists files ending with five to 15 dot text.

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You can stop the video and try it on your own if you want.

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You know how we will display file 5 up to file 9 using square brackets.

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But that's not the solution because we want to display also file followed by number one and then followed

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by 0 up to 5 solution.

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Here is to.

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Kurt lubricates inside them for the first part we specify in square brackets.

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8:55 disability files ending with 5 to 9 dot text as a second part inside curly brackets will specify

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wildcards for listing file 10 to 5 15.

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So we need to write one and it doesn't need to be inside square brackets.

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If there is only one number inside square brackets it means the same as that number without brackets.

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Because square brackets means range and we shorten the range to only one number an inside and hador

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square brackets we will specify a range 0 to 5 so it will match 10 11 12 13 14 15 and as it works perfectly

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you can see four or five up to five 15.

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Great.

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Now we can try one of the most common wildcards music we've list all image files

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to do that.

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We type out as asterisk which represents any number of connectors.

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Then we specify don't dot MGE a specific extension.

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Great.

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We list all image files.

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Now I will create a screen

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and then we can use wildcards for removing files

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so remove files ending with 16 up to 21 that I MGE

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to do that will again use curly brackets on the first part of them.

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We will specify a range 16 up to 19

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and on the second part specify a range.

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Then they do find the one.

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Now we can check if that follows variability and

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and yes they were removed.

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You see how wildcards are really powerful

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but let's make now last example using wildcards

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to list all files which has three characters long extension starting with the letter T.

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To do that type out as asterisk dot the question mark question mark as question mark three persons one

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character and NEA's we see all textfile displayed.

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We can now clear the screen and write some script to see usage of wild wildcards in string comparison.