how to compare big real numbers

Shell Programming and Scripting
1

Hi everyone,

I need to compare 2 big Floating/Real numbers in a script.

After the comparission it is showing worng values in my script.

echo "Enter value1"
read value1
echo "Enter value2"
read value2

Result=`echo "if($value1 > $value2) 1" | bc`

if [ $Result -eq 1 ]; then
echo "$value1 is greater"
fi

Please correct this code ..

2

Hi everyone,

I need to compare 2 big Floating/Real numbers in a script.

After the comparission it is showing worng values in my script.

echo "Enter value1"
read value1
echo "Enter value2"
read value2

Result=`echo "if($value1 > $value2) 1" | bc`

if [ $Result -eq 1 ]; then
echo "$value1 is greater"
fi

Please correct this code ..

3

The script seems correct, but you may substitute "bc" with "bc -l".

4

try echo $Result to see what it actually contains.

5

What shell are you using? Not all shells support floating
point number comparison.

If you are using ksh you may need to do something like

echo "Enter value1"
typeset -F value1
read value1