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.