Printing multiplication formula with shell script

This article will show you how to print multiplication formula with shell script.

There are two ways to print multiplication formulas.

1. Use awk command

awk 'BEGIN{for(n=0;n++<9;){for(i=0;i++<n;)printf i"x"n"="i*n" ";print ""}}'

2. Use loop

for ((i=1;i<=9;i++)); do 
   for ((j=1;j<=i;j++)); do 
      result=$(($i*$j)) 
      echo -n "$j*$i=$result " 
    done 
    echo
done

3. Output

1x1=1 
1x2=2 2x2=4 
1x3=3 2x3=6 3x3=9 
1x4=4 2x4=8 3x4=12 4x4=16 
1x5=5 2x5=10 3x5=15 4x5=20 5x5=25 
1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36 
1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49 
1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64 
1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81

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