2025-07-18 ...before ...ibancheck20250607.sh

#!/bin/bash

# (C) David Vajda
# IBAN Check
# 2025-06-06

i=3
A=(echo $*)
y=0
while [ $i -lt $(($#)) ]
do
    y=$(((($y*100)+${A[$i]})%97))
    i=$(($i+1))
done
echo "$y"
echo "$((98-$y))"