#!/bin/zsh
# calcsum -- takes integer input and calculates the sum
# http://www.jpsdomain.org/linux/OnStream_DI-30-RedHat_Backup_mini-HOWTO.html
# v1.0 21-Feb-2001 JP Vossen
# v1.1 15-Nov-2001 JPV Changed to use zsh, as RedHat 7.1 has 
# 	PD KSH v5.2.14 99/07/13.2 that fails as sh, etc. below.

# Copyright 2001 JP Vossen
# This script is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
# General Public License for more details.

# In no event shall the author be liable for any damages whatsoever
# (including, without limitation, damages for loss of business profits,
# business interruption, loss of business information, or any other
# pecuniary loss) arising out of the use of or inability to use this script.

# NOTE: MUST use zsh because sh, bash, bash2 can't add!
# At 2147483648 they start counting BACKWARDS.

TOT=0
while read N; do
    let TOT=${TOT}+${N}
done
echo "${TOT}"