$@ 和 $*的区别：@可以打散变量 ， *则是所有变量作为整体

测试脚本：

#!/bin/usr/env bash
echo $*
echo $@

echo "for loop of \"\$*\""

for var in "$*"
do
echo $var
done

echo "for loop of \"\$@\""
for var in "$@"
do
echo $var
done

 

运行：bash test.sh 1 2 3 4

运行结果：

 

1 2 3 4
1 2 3 4
for loop of "$*"
1 2 3 4
for loop of "$@"
1
2
3
4