#!/bin/sh

count=0

echo "Type in as many non-zero numbers as you like (one per line)"
echo "Type 0 to stop"

read number
while [ $number -ne 0 ]
do
  if [ $number -lt 0 ]
  then
    count=`expr $count + 1`
  fi
  read number
done

echo "You entered $count negative numbers"