Now launch the terminal in Ubuntu 20.04 and type the following command in it to execute the ForLoop.sh file:Īs soon as this file will execute successfully, you will be able to see all the elements of the writers’ array on your terminal: Once you have typed this script, just save your file and close it. Since in this scenario, we simply want to print all the elements of an array on the terminal, therefore, we have used the echo command followed by a “$” symbol and the iterator that we specified after the “for” keyword. In Bash scripting, whatever we want to do inside a “For” loop is enclosed within the “do” and “done” keywords. Also, the symbol enclosed within the square brackets after the name of the array represents that we are trying to refer to the iterator of this loop which in this case is “i”. Whenever the “$” symbol is typed before an array index, then it implies that we are trying to access the value of that particular index. The purpose of this loop is to iterate through every element of this array and print them all one by one. Then it has a “For” loop which has an iterator “i”. This script declares an array variable named writers and assigns it five values i.e.

Now type the script shown in the following image in your newly created bash file. We have created this file in the Home folder by right-clicking on an empty space in it and then choosing the New Document option from the cascading menu and then we selected the Empty Document option from the sub-cascading menu. sh extension after an ordinary document name. A Bash file can simply be created by typing in the. However, you can also have any other name of your choice. We will first create a Bash file with the name ForLoop.sh.

Method of using “For” Loop for printing all the Elements of an Array:įor printing all the elements of an array on the terminal by making use of the “For” loop, we will have to perform the following steps: Therefore, in this article, we will be talking about the three different scenarios in which you can use the “For” loop for iterating through an array. The basic purpose of using this loop is to iterate through arrays which can also lead to other complex calculations. Similarly, Bash also has a dedicated syntax for making use of the “For” loop. “For” loops are very commonly used in all the programming languages.

Loop half of a key