[shell]shell脚本统计数值大小

#! /bin/bash

array=( ... )
var1=
var2=

for((i=;i<=;i++));
do
    array[i]="$( cat /sys/bus/iio/devices/iio\:device0/in_voltage6_raw )"
    # echo ${array[i]}
    if [ "${array[i]}" -ge "" ]
    then
        if [ "${array[i]}" -le "" ]
        then
            let var1=var1+
        fi
    fi
    if [ "${array[i]}" -ge "" ]
    then
        if [ "${array[i]}" -le "" ]
        then
            let var2=var2+
        fi
    fi
    sleep 0.0001
done

echo $var1
echo $var2