using expr to prinbt floating point result.

max_rsr · 03-12-2005, 10:30 AM

Please help me with the following problem

How can i use expr to print a floating point value

for example 14 /3 would result in 4 not 4.67
How can I achieve the floating point value?

Please help me with the following Shell script

the scripts seems to ask for a binary operator ..

# mgrep -- search for a file for 3 words in a line
# usage -- mgrep FILENAME word1 word2 word3.
...
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please Help.

enemorales · 03-14-2005, 01:43 AM

From

http://linuxreviews.org/beginner/abs.../en/c2850.html

Quote:

Bash does not understand floating point arithmetic. It treats numbers containing a decimal point as strings.

a=1.5

let "b = $a + 1.3" # Error.
# t2.sh: let: b = 1.5 + 1.3: syntax error in expression (error token is ".5 + 1.3")

echo "b = $b" # b=1

Use bc in scripts that that need floating point calculations or math library functions.

Hope this helps...