What is Syntax for a Single-Line while Loop in Bash
A single-line while loop is mainly used to run a command or a set of commands recursively as far as a specific condition is true so below is the syntax for a single line while loop in bash:
The condition is evaluated at the beginning of each iteration, and if it is true, the commands inside the loop are executed, whereas the loop will terminate once it becomes false.
echo "Enter any number: "
read number
count=1
while [ $count -le $number ]; do echo $count; ((count++)); done
In this example, the script prompts the user to enter a number, which is stored in the variable num and then a counter variable is initialized with a value of 1. The while loop checks whether the counter is less than or equal to the entered number and if it is, the loop prints the current value of the counter and afterwards increase it by 1.
Conclusion
The single line while loop in bash is quite helpful for executing a set of commands recursively for a certain condition until it is valid. The syntax for the single line while loop is straightforward and easy to understand and this article provided an example of a bash script that uses a single-line while loop to prompt the user for a number and then print out all the numbers up to that number.
