linux - 通过 If 语句判断数值是否超出范围

Question

我试图在 bash 中构建一个动态的 IF 语句来确定一个数字是在预定义范围内还是在预定义范围外。

some.file

-11.6

Bash 代码:

check=`cat some.file`

if [ ${check} -le "-7.0" ] && [ ${check} -ge "7.0" ];
then
echo "CAUTION: Value outside acceptable range"
else
echo "Value within acceptable range"
fi

现在，当显然 -11.6 小于 -7.0 并因此超出范围时，我得到“值在可接受范围内”的返回值。

Answer 1

试试这个 -

$ cat f
2
$ awk '{if($1 >= -7.0 && $1 <= 7.0) {print "Value within acceptable range"} else {print "CAUTION: Value outside acceptable range"}}' f
Value within acceptable range

$ cat f
-11.6
$ awk '{if($1 >= -7.0 && $1 <= 7.0) {print "Value within acceptable range"} else {print "CAUTION: Value outside acceptable range"}}' f
CAUTION: Value outside acceptable range

或

$ cat kk.sh
while IFS= read -r line
do
if [ $line -ge -7.0 ] && [ $line -le 7.0 ]; then
echo "Value within acceptable range"
else
echo "CAUTION: Value outside acceptable range"
fi
done < f

正在处理......

$ cat f
2
$ ./kk.sh
Value within acceptable range

---

$ cat f
-11.2
$ ./kk.sh
CAUTION: Value outside acceptable range