Sum with bash

bash_bc.md

If you are working in a bash-like environment such as Git Bash on Windows, you can use the built-in shell arithmetic expansion feature for calculating sums. That feature allows you to perform arithmetic operations within your shell script without using any external commands like bc.

A script like:

#!/bin/bash
# read each line from the file
while read line; do
  # evaluate the arithmetic expression in the line
  result=$((line))
  # print the result
  echo $result
done < yourfile.txt

Replace yourfile.txt with the name of your file. Each line in your file should contain an arithmetic expression, like 2 + 2 or 3 * 7. The script will calculate the result of each expression and print it.

Warning: bash only supports integer arithmetic, so if you need to perform operations with floating point numbers, you will have to use a different approach.