BASH comma-separated list of numbers

num-list.sh

#!/bin/bash
 
  echo "Input variable #1 "
  read var1
  echo "variable #1 = $var1"
  echo
  echo "Input variable #2 "
  read var2
  echo "variable #2 = $var2"
  echo
 
# ------------------------------------------- #
 
#  As with "for" and "while" loops,
#+ an "until" loop permits C-like test constructs.
 
 
 
until (( var1 > var2 ))
do  # ^^ ^     ^     ^^   No brackets, no $ prefixing variables.
  echo -n "$var1,"
  (( var1++ ))
done    # 0,1,2,3,4,5,6,7,8,9,10,
 
 
exit 0