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What is issue with this script?


 
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Top Forums Shell Programming and Scripting What is issue with this script?
# 1  
Old 06-10-2013
What is issue with this script?

Code:
#!/bin/ksh
i=1
while [ $i -le 5 ]
do
j=0
 while [ $j -lt $i ]
 do
  echo "$i"
  j =`expr $j + 1`
 done
i=`expr $i + 1`
done


Last edited by Scrutinizer; 06-10-2013 at 01:39 PM.. Reason: code tags
# 2  
Old 06-10-2013
There should not be any blank space around assignment operator:
Code:
j=`expr $j + 1`

# 3  
Old 06-10-2013
There is a blank between "j" and "=" where it is not supposed to be:

Code:
  j=`expr $j + 1`

# 4  
Old 06-10-2013
Code:
j =`expr $j + 1`
# should be:
j=`expr $j + 1`

# 5  
Old 06-10-2013
Thanks all guys,

I am newbie here and it seems you guyz blasted it within seconds.These spaces are killing in Shell scripting.

And guyz can you tell how to check for an error while executing a shell script as a person who wrote a script is unaware where the error lies.

Rgds,
TS
# 6  
Old 06-10-2013
It's just like debugging in general ... try to simplify your script until it starts to work, then add functionality until the problem shows up. Your last change is probably the cause of the problem.
# 7  
Old 06-10-2013
You can set xtrace / verbose to debug the script:
Code:
#!/bin/ksh -xv


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