increment... - Shell Programming and Scripting

cengiz · #1 07-13-2005

hi,

i want to increment a Variable but it doesnt work.

here my codé

Code:

COUNT=1
COUNT= 'expr $COUNT + 1'

i've tried it in the prompt but it print me:
expr: syntaxerror

What does I make wrong?

vino · #2 07-13-2005

Use

Code:

count=1
count=$((count+1))

vino

cengiz · #3 07-13-2005

thank you

now it works

pixelbeat · #4 07-13-2005

be careful of spaces. You can't have spaces around =

COUNT=`expr $COUNT + 1`

vinos method uses the bash specific syntax
which will run faster as it doesn't need to
start a seperate expr process per increment.

cengiz · #5 07-13-2005

ok pixelbeat
thanks

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