How to loop through mixed numbers in Bash

Question

For example:

for s in 1..5,20..23,97..99;
do
   echo $s;
done
1..5,
20..23,
97..99

How to make it loop through 1,2,3,4,5,20,21,22,23,97,98,99?

PesaThe · Accepted Answer · 2018-01-11 19:39:14Z

4

You need to use brace expansion { } syntax:

for num in {1..5} {20..23} {97..99}; do
   echo "$num"
done

answered Jan 11, 2018 at 19:39

PesaThe

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2 Comments

karakfa Over a year ago

might be better in full form {{1..5},{20..23},{97..99}} preventing accidents when space is missing {1..5} {20..23}{97..99} which will give you 1 2 3 4 5 2097 2098 2099 2197 2198 2199 2297 2298 2299 2397 2398 2399

PesaThe Over a year ago

@karakfa Well, either you have to remember to use a space or to use a comma. {{1..5},{20..23}{97..99}} would do the same.

iamauser · Accepted Answer · 2018-01-11 19:45:32Z

2

You can use seq,

 for s in $(seq 1 5) $(seq 20 23) $(seq 97 99);
 do
   echo $s;
 done

Result:

brace expansion { } is another choice.

answered Jan 11, 2018 at 19:45

iamauser

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