HowTo: Unix For Loop 1 to 100 Numbers

by on January 16, 2010 · 1 comment· LAST UPDATED July 16, 2011

in , ,

I want to run a Unix command 100 times using a for loop from 1 to 100. Can you tell me how to take a block of numbers in a loop under KSH or BASH shell?

You can use the following syntax to run a for loop.

Ksh For Loop 1 to 100 Numbers

 
#!/bin/ksh
# Tested with ksh version JM 93t+ 2010-03-05
for i in {1..100}
do
 # your-unix-command-here
 echo $i
done
 

Bash For Loop 1 to 100 Numbers

 
#!/bin/bash
# Tested using bash version 4.1.5
for ((i=1;i<=100;i++));
do
   # your-unix-command-here
   echo $i
done
 

Dealing With Older KSH88 or Bash shell

The above KSH and Bash syntax will not work on older ksh version running on HP-UX or AIX. Use the following portable syntax:

 
#!/usr/bin/ksh
c=1
while [[ $c -le 100 ]]
do
  # your-unix-command-here
   echo "$c"
   let c=c+1
done
 
TwitterFacebookGoogle+PDF versionFound an error/typo on this page? Help us!

{ 1 comment… read it below or add one }

1 Ewerton Ciuffo March 28, 2014 at 6:25 pm

This script worked for me in AIX

#!/bin/bash
for i in {1..10}
 do
    echo $i
 done

Reply

Leave a Comment

Tagged as: , , , , , , , , , , , , , , ,

Previous Faq:

Next Faq: