我们来比较一下三种语言的条件语句
shell条件语句
if condition
then
    command1 
    command2
    ...
    commandN 
fi
javascript
if (condition) {
    command1;
    command2;
    ...
    commandN;
}
python
if condition:
    command1;
    command2;
    ....
    commandN;
shell靠then..fi标记代码块,javascript靠{},而phthon靠缩进。
原文:https://www.cnblogs.com/dapplehou/p/13432125.html