用shell脚本写出乘法表

可以使用嵌套循环来实现乘法表，以下是一个示例脚本：

#!/bin/bash

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

输出结果如下：

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