how to store the output of a command to a variable in shell script code example

Example 1: save output of command to variable bash

OUTPUT="$(ls -1)"
echo "${OUTPUT}"

MULTILINE=$(ls \
   -1)
echo "${MULTILINE}"

Example 2: shell script store command output in variable

#Just use following structure to store output of command into a variable:
var=$(command)
#For example:
var=$(echo 'hi')	#store hi into var
var=$(ls)	#store list of files into var