如何跳过vim来使用shell编写99乘法表

你可以按下「Esc」键，然后输入「:q!」来退出 Vim 编辑器，然后使用 shell 编写九九乘法表，例如：

for i in $(seq 1 9); do
    for j in $(seq 1 $i); do
        echo -n "$i x $j = $(expr $i \* $j)   "
    done
    echo ""
done

这段代码会输出如下的九九乘法表：

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