#!/bin/bash

for i in {1..9}
do
for ((j=1;j<=i;j++))
do
pro=$((ij))
echo -n "$j $i = $pro "
done
echo
done

1 1 = 1
1 2 = 2 2 2 = 4
1 3 = 3 2 3 = 6 3 3 = 9
1 4 = 4 2 4 = 8 3 4 = 12 4 4 = 16
1 5 = 5 2 5 = 10 3 5 = 15 4 5 = 20 5 5 = 25
1 6 = 6 2 6 = 12 3 6 = 18 4 6 = 24 5 6 = 30 6 6 = 36
1 7 = 7 2 7 = 14 3 7 = 21 4 7 = 28 5 7 = 35 6 7 = 42 7 7 = 49
1 8 = 8 2 8 = 16 3 8 = 24 4 8 = 32 5 8 = 40 6 8 = 48 7 8 = 56 8 8 = 64
1 9 = 9 2 9 = 18 3 9 = 27 4 9 = 36 5 9 = 45 6 9 = 54 7 9 = 63 8 9 = 72 9 * 9 = 81