Unix Tip #4559- September 4, 2013


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GENERATE RANGES OF NUMBERS


Sometimes it is necessary to generate a range of
numbers for further use within a command pipe or
shell script. This can be done with some simple
sh-code:

------------------------ CUT HERE ------------------

#! /bin/sh

# range - Generate of numbers.

lo=$1
hi=$2

while [ $lo -le $hi ]
do
echo -n $lo " "
lo=`expr $lo + 1`
done

------------------------ CUT HERE ------------------

It can now be used a way like:

for i in `range 69 4711`; do ; done

This tip generously supported by: ulli@ucrc.org


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