In this tutorial, we will cover the basics of for loops in Bash. We will also show you how to use the break and continue statements to alter the flow of a loop.
Loops are one of the fundamental concepts of programming languages. Loops are handy when you want to run a series of commands over and over again until a certain condition is reached.
In scripting languages such as Bash, loops are useful for automating repetitive tasks.
In this tutorial, we will cover the basics of for loops in Bash. We will also show you how to use the
continue statements to alter the flow of a loop.
for loop iterates over a list of items and performs the given set of commands.
for loop takes the following form:
for item in [LIST] do [COMMANDS] done
The list can be a series of strings separated by spaces, a range of numbers, output of a command, an array, and so on.
In the example below, the loop will iterate over each item in the list of strings, and the variable
element will be set to the current item:
for element in Hydrogen Helium Lithium Beryllium do echo "Element: $element" done
This tutorial explains the basics of the until loop in Bash. The until loop is used to execute a given set of commands as long as the given condition evaluates to false.
Loops are one of the fundamental concepts of programming languages. This tutorial covers the basics of while loops in Bash.
Learn to use if-else statements, for loops, and while loops to build complex conditional programs in R, a valuable skill for aspiring data scientists.
For loop in C++ Program | C++ For Loop Example.
In this tutorial, we will cover the basics of the select construct in Bash. The select construct generates a menu from a list of items. It has almost the same syntax as for loop.If the user enters a number that corresponds to the number of one of the displayed items, then the value of [ITEM] is set to that item. The value of the selected item is stored in the variable REPLY. Otherwise, if the user input is empty, the prompt and the menu list are displayed again.