linux - Add and Multiply numbers using shell script -


i'm learning shell scripting, i'm trying write small script adds , multi number shown below amt value not display 

value=212 amt=`expr "( $value * 2 + ( $value * 2 * .075 ) ) " | bc` echo $amt

your given code works fine, intend suggest improvements:

  1. use $(...) instead of backticks.
  2. replace expr echo.

example:

value=212 amt=$(echo "( $value * 2 + ( $value * 2 * .075 ) ) " | bc) echo $amt

output:

455.800

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