Comparing decimal numbers in Bash Shell

#!/bin/bash


ROUND_OFF=100000000   # This is how much accuracy we have 
                      # (to the nearest 10 millionth for this example)
                      
DECIMAL=3.3333333333  # This is our decimal value
COMPARE_TO=5          # This is the value we want to compare the decimal value to



#
# CONVERT OUR BIG DECIMAL INTO A BIG INTEGER FOR COMPARING
#

# bc -l does the float calculation
# awk cuts off the decimal part
int=`echo $DECIMAL '*10000000' | bc -l | awk -F '.' '{ print $1; exit; }'`





#
# IF COMPARE_TO IS DECIMAL TOO, CONVERT IT HERE JUST LIKE ABOVE
# IT'S NOT IN THIS CASE SO LEAVE THE BOTTOM COMMENT BY ITSELF FOR NOW
#

#compare_int=`echo $COMPARE_TO '*10000000' | bc -l | awk -F '.' '{ print $1; exit; }'`
compare_int=`expr $COMPARE_TO '*' $ROUND_OFF`  # Since COMPARE_TO is not a float, we'll just do this than above





#
# NOW COMPARE THE NUMBERS
#
if [ $compare_int -gt $int ] ; then
  echo $COMPARE_TO " > " $DECIMAL
elif [ $compare_int -lt $int ] ; then
  echo $COMPARE_TO " > " $DECIMAL
else
  echo $COMPARE_TO " == " $DECIMAL
fi




#
# OUTPUT:
#
#|psycho@Shiva|: ./decimal.sh 
#5  >  3.3333333333

        #!/bin/sh
        case `echo "a=$a;b=$b;r=-1;if(a==b)r=0;if(a>b)r=1;r"|bc` in
           0) echo a=$a and b=$b are equal
        ;; 1) echo a=$a is bigger then b=$b
        ;; *) echo a=$a is less then b=$b
        ;; esac