for迴圈嵌套

標籤：for

#!/bin/bash
for (( i = 1 ; i < 10; i++ ))
do
        for (( j = 1; j <= i; j++ ))
        do
                let "sum = i * j"
                echo -n "$i*$j=$sum "
        done
        echo ""

done

[[email protected] shell]# ./loop.sh
1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

#################################

#!/bin/bash
for (( i = 1 ; i <=8 ;  i++ ))
do
        for (( j = 0; j <= 8 ; j++ ))
        do
                total=$(( $i + $j ))
                tmp=$(( $total % 2 ))
                if [[ $tmp -eq 0 ]];then
                        echo -e -n "\033[47m"
                else
                        echo -e -n "\033[40m"00
                fi
        done
done

本文出自 “8176010” 部落格，謝絕轉載！