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Adding two reals in shell

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wida -  
Hello,

I want to add two real numbers in a shell script. I've tried doing it in several ways, but none have produced a good result.

The only command that seems to work partially is the following: 

addition='echo $var1 + $var2 | bc -l'


It displays the result with an error: 

script.sh: line 40: 1.560: command not found


Knowing that 1.560 is the expected result.

What do you think?

Configuration: Mac OS X / Safari 533.19.4

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(J. FIAUX).

4 answers

  1.  zipe31 Contributor
    Hello, 

    addition=$(echo "$var1 + $var2" | bc -l)

    ;-))

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    1
    1. wida Author
      It works very well for addition, but that's not the case if I do a division!!
      Is it possible to divide a real number by an integer in bash?
      0
    2. zipe31 Contributor
      Ben yes : 

      $ A="22.53";B="8" $ D=$(echo "$A/$B" | bc -l) $ echo $D 2.81625000000000000000 $
      0
    3. wida Author
      When we run the commands like that in line, yes it works, but in the script I have the same error as before: I get the result with command not found!
      0
    4. zipe31 Contributor
      Show your script!
      0
    5. wida Author 
      ping1="0.456" ping2="0.765" ping3="0.973" ping=$(echo "$ping1 + $ping2 + $ping3" | bc -l) ping=$(echo "$ping / 3" | bc -l)
      0