Bash scripting silly question

itz2000 · 05-09-2007, 05:51 PM

hello.. I've found a way to increase lets say a counter... but I think my way is stupid, there must be better solution...

Code:

hey=1
hey=`echo $hey+1 | bc`

I think the best way is something like hey={$$hey}+1
but I'm not familiar with the right syntax.

Thanks.

osor · 05-09-2007, 05:58 PM

What about

Code:

let hey+=1

osor · 05-09-2007, 05:59 PM

Alternative:

Code:

hey=$(($hey+1))

jschiwal · 05-09-2007, 07:24 PM

If it is a loop counter, you can use this form of the "for" command:

for (( index=100; index<200; index++ )); do

osor · 05-09-2007, 07:32 PM

Oh, I completely forgot about

Code:

let hey++

jlliagre · 05-09-2007, 07:57 PM

The old (and more portable) way :

Code:

hey=`expr $hey + 1`