Iterate through folders with names like folder0100, folder0101 to folder1100 in shell script

Using seq:

for i in $(seq -w 0 1100); do    cp test$i/test.out executables/test$i.outdone

with the -w flag seq pads generated numbers with leading zeros such that all numbers have equal length.

bash shell scripting-language

How about this -

#!/bin/bashfor (( i = 0; i < 1100; i++))do    cp test$(printf "%04d" $i)/test.out executables/test$(printf "%04d" $i).outdone

bash shell scripting-language

With a recent bash

#!/bin/bashfor i in {0000..1100}; dodo    cp test$i/test.out executables/test$i.outdone

Note that brace expansion occurs before variable expansion (see the manual) so if you want to do

start=0000stop=1100for i in {$start..$stop}

that won't work. In that case, use seq

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