How to Create One Line Loop in Bash

This article will explain how we can create one-line loops in Linux Bash. We will write example scripts with the for loop.

Create One Line Loop in Linux Bash

We can create simple one-line loops in different ways as follows.

Write Each Element Inside the Loop

We can write the elements in the loop one by one.

for i in "apple" "banana" "orange"; do echo "$i"; done

Specify a Range of Numbers

A range of numbers can be used to create a one-line loop.

for i in {1..3}; do echo "step: $i"; done

Create Loop With Subcommand

We can use subcommands to specify the values used in the loop. This method is especially useful for reading file contents.

for i in `seq 1 3`; do echo "step: $i"; done;

for i in `cat file.txt`; do echo "step: $i"; done;