[eric@vm18 ~]$ cat xxx.log
Cmp1_F:  10.123
Cmp2_F:  112.123
Cmp3_F:  1012.123
Cmp4_F:  1512.123



[eric@vm18 ~]$ cat test2.sh
##COMPARISON

Amount=5
UPPER=1234.567
LOWER=12.3456

for((  Num=1 ; Num<$Amount ; Num++ ))
do
   eval Cmp${Num}_F=$(cat xxx.log | grep Cmp${Num}_F | awk '{ print $2 }')
done

for(( Num=1 ; Num<$Amount ; Num++ ))
do
  eval "tmp=\${Cmp${Num}_F}"
  if [ `echo $tmp'>'$UPPER | bc -l` -eq 1 ] || [ `echo $tmp'<'$LOWER | bc -l` -eq 1 ]; then
    echo "Data $tmp is Not in Range"
  else
    echo   "Data $tmp is in Range From : ($LOWER ~ $UPPER)"
  fi
done



[eric@vm18 ~]$ bash test2.sh
Data 10.123 is Not in Range
Data 112.123 is in Range From : (12.3456 ~ 1234.567)
Data 1012.123 is in Range From : (12.3456 ~ 1234.567)
Data 1512.123 is Not in Range



[eric@vm18 ~]$