new "for" loop syntax in Korn shell 1

[risby]

Has anybody seen this Korn shell syntax for a for loop

for (( i=0; i<10; i++ ))
do
  print $i
done

An employee of the company I'm working for at the moment just asked me why he got a "syntax error: `((' unexpected" message.

I showed him how to do it as a while loop but I am intrigued as to which version of Korn shell might support this syntax.

My O'Reilly "Learning the Korn Shell" (c) 1993 does mention a c style arithmetic for loop as a future feature.

It isn't available in the PD KSH v5.2.14 99/07/13.2 that I have.

==========================================

I phoned the local ramblers club today, and this bloke just went on and on.

 

[PHV]

This is ksh-93 syntax.

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[columb]

No output, but no error message either from RedHat bash, syntax error in RedHat and AIX 5.1 ksh

On the internet no one knows you're a dog

Columb Healy

 

[feherke]

Hi

No output, but no error message either from RedHat bash

Strange. [tt]bash[/tt] knows that C-like [tt]for[/tt] syntax, but you should get an error for the unknown [tt]print[/tt] built-in.

Feherke.

http://rootshell.be/~feherke/

 

[columb]

feherke
From my RedHat server

[root@gbmddh221usvr]# uname -a
Linux gbmddh221usvr 2.6.9-67.0.1.ELsmp #1 SMP Fri Nov 30 11:51:05 EST 2007 i686 i686 i386 GNU/Linux
[root@gbmddh221usvr]# for (( i=0; i>10; i++ )); do   print $i; done
[root@gbmddh221usvr]#

On the internet no one knows you're a dog

Columb Healy

 

[PHV]

for (( i=0; i[!]<[/!]10; i++ )); do print $i; done

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[columb]

Durr....

Another embarassing oops from Columb!

The output is now

[root@gbmddh221usvr /]# for (( i=0; i<10; i++ )); do   print $i; done
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
-bash: print: command not found
[root@gbmddh221usvr /]# for (( i=0; i<10; i++ )); do   echo $i; done
0
1
2
3
4
5
6
7
8
9
[root@gbmddh221usvr /]#

as predicted.

On the internet no one knows you're a dog

Columb Healy