Concatenate an array with itself.sh

#Given a list of countries, each on a new line, your task is to read them into an array. Then, concatenate the array with itself (twice) - so that you have a total of three repetitions of the original array - and then display the entire concatenated array, with a space between each of the countries' names.

#$cat command is used to read lines from an input stream.

myArray=($(cat))

#echo ${myArray[@]}

myArray=("${myArray[@]}" "${myArray[@]}" "${myArray[@]}")


echo ${myArray[@]}