Batch file 批量处理负十进制数

我的是一个非常简单的代码——我想知道两个日期之间的差异是否会产生负面影响。问题不在于获取值，而在于检查它们是否为负值。这是我的密码：

if !val! LSS 0 (
         echo value is !val!
         echo value is less than zero - SLA breached!
    ) else (
         echo value is !val!
         echo value is greater than zero - SLA not breached.
    )

的值！瓦尔是：

-0.9513888888888888888888888888888888888889           
63.06736111111111111111111111111111111111 
-1.09722222222222222222222222222222222222 
-1.19236111111111111111111111111111111111 

前两个结果很好——在检测它们是积极的和消极的方面没有问题。接下来的两个批次说它们比一个大！结果如下：

 value is -.95138889
 value is less than zero - SLA breached

 value is 63.0673611
 value is greater than zero - SLA not breached.

 value is -1.1923611
 value is greater than zero - SLA not breached.

 value is -1.0972222
 value is greater than zero - SLA not breached.

 value is 63.0673611
 value is greater than zero - SLA not breached.

 value is -.95138889
 value is less than zero - SLA breached

 value is -1.0972222
 value is less than zero - SLA breached

 value is -1.1923611
 value is less than zero - SLA breached

我哪里出错了？
我找到了一种不同的方法来解决这个问题-

 if "!val:~0,1!"=="-" (
    echo value is !val!
    echo value is less than zero - SLA breached!
    ) else (
    echo value is !val!
    echo value is greater than zero - SLA not breached.
    )

结果如下：

 value is -.95138889
 value is less than zero - SLA breached

 value is 63.0673611
 value is greater than zero - SLA not breached.

 value is -1.1923611
 value is greater than zero - SLA not breached.

 value is -1.0972222
 value is greater than zero - SLA not breached.

 value is 63.0673611
 value is greater than zero - SLA not breached.

 value is -.95138889
 value is less than zero - SLA breached

 value is -1.0972222
 value is less than zero - SLA breached

 value is -1.1923611
 value is less than zero - SLA breached

希望这对别人有帮助
 批处理不能使用浮点数OK，那么我必须在这里使用powershell。谢谢你，卡！值
0
或
0.000
或
+0.0
或
-.0
将被错误处理，但
如果！瓦尔：。=！EQU 0
应该可以处理这个问题……我的结果不会产生+0.0，我验证了-0.0也可以正常工作（违反了sla）。我用的逻辑是把0或0看成是正的（SLA没有违反）：-谢谢！