Shell Script: Write 000 to 999 (1000 lines in a file) using Brace Expansion

We need to write from 000 to 999 in a file. As these are consecutive numbers we will be using "Brace Expansion"

Let's Create a file by using the touch command.

Script:

 #create an empty file
touch output.txt 

#using brace expansion with foor loop

 for i in {000..999} #this is brace expansion

do

    #append data to output.txt 

    echo $i >> output.txt

done

Output: 

To see the output use bellow command

        cat output.txt | more