Shell scripts (the multiplication table, right triangle, isosceles triangle, any interactive diamond, any interactive square)

A. Multiplication table script

#!/bin/bash
#九九乘法表
i=1
while [ $i -le 9 ]
do
for (( j=1;j<=9;j++ ))
do
[ $j -le $i ]&& echo -n "$i$j=$((ij)) "
done
echo " "
let i++

done

1 1= 1
21=2 22=4
31=3 32=6 33=9
41=4 42=8 43=12 44=16
51=5 52=10 53=15 54=20 55=25
61=6 62=12 63=18 64=24 65=30 66=36
71=7 72=14 73=21 74=28 75=35 76=42 77=49
81=8 82=16 83=24 84=32 85=40 86=48 87=56 88=64
91=9 92=18 93=27 94=36 95=45 96=54 97=63 98=72 9*9=81

II. Script right triangle

#！/bin/bash
#直角三角形
i=1
while [ $i -lt 10 ]   //变量i小于10
 do
j=1
while [ $j -le $i ]     //变量j 小于等于变量i
 do
echo -n x       //输出X
j=$(($j+1))
done
echo
i=$(($i+1))
done
exit 0
~                    

x
xx
xxx
xxxx
xxxxx
xxxxxx
xxxxxxx
xxxxxxxx
xxxxxxxxx

III. Isosceles triangle script

#!/bin/bash
#等腰三角形
i=1
while [ $i -le 10 ] ; do    //变量i小于等于10
j=1
while [ $j -le $((10-$i)) ] ; do  
echo -n '  
j=$(($j+1))
done
j=1
while [ $j -le $((2*$i-1)) ] ; do
echo -n x
j=$(($j+1))
done
echo
i=$(($i+1))
done
exit 0
~                          

         x
        xxx
       xxxxx
      xxxxxxx
     xxxxxxxxx
    xxxxxxxxxxx
   xxxxxxxxxxxxx
  xxxxxxxxxxxxxxx
 xxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxx

IV. Any interactive diamond

#!/bin/bash
read -p"请输入菱形的长度: " fff
for((i=1;i<=$fff;i++))          //控制行数
do
    for((j=$fff;j>i;j--))         //控制空格
    do
        echo -n " "
    done

    let "g=2*i-1"

        for m in `seq 1 $g`     //控制*数量，输出2个
    do
        echo -n "*"
    done

    echo ""
done

for((i=2;i<=$fff;i++))       
do
    for ((j=1;j<i;j++))
    do
        echo -n " "
    done

    let "k=2*(fff-i)+1"

V. any interactive square

#!/bin/bash
read -p "请输入正方形的长度: " ggg

for ((i=1;$i<=$ggg;i++))
do
    for ((j=1;j<=$((2*$ggg));j++))
    do
        echo -e "+\c" 
    done
    echo
done

[root@localhost ~]# ./ggg.sh
请输入正方形的长度: 5
++++++++++
++++++++++
++++++++++
++++++++++
++++++++++

[root@localhost ~]# ./ggg.sh
请输入正方形的长度: 7
++++++++++++++
++++++++++++++
++++++++++++++
++++++++++++++
++++++++++++++
++++++++++++++
++++++++++++++