shell脚本之if elif写法

#!/bin/bash
a=100
b=150
if [ $a == $b ]
then
echo "a==b"
elif [ $a -gt $b ]
then
echo "a > b"
elif [ $a -lt $b ]
then
echo "a < b"
else
echo "a b not known"
fi

输出结果：

a < b