Write a For loop in shell scripting language

Home

Shell Programming

Write a For loop in shell scripting language

Write a For loop in shell scripting language

PDF

Here is an example of a for loop in FreeBSD's UNIX Shell (sh)

a for loop

#!/bin/sh
for i in a b c d
do
echo $i
done

Another example of a for loop:

a for loop, example 2

#!/bin/sh
for i in 1 2 3 4 5
do
echo $i
done

In third example you can use a for loop to iterate through a list of directories:

a for loop through a list of directories

#!/bin/sh
directories=`ls /`
for i in $directories
do
echo $i
done

Forth example display numbers from 1 to 20 in a for loop. To generate 20 numbers we use jot command:

Display numbers from 1 to 20 in a for loop using UNIX Shell Scripting

#!/bin/sh
numbers=`jot - 1 20`
for i in $numbers
do
echo $i
done

< Prev		Next >

Main Menu

Latest Tutorials

BSD Applications

C and C++ Programming

Shell Programming

Perl Programming

FreeBSD Hardware

Tips

Applications Tips

Programming Tips

Other BSD Systems

Resources

FreeBSD Resources

Search Mail Lists

Polls

Best BSD firewall?

	ipfilter
	ipfw
	pf

News FreeBSD.org