I am very new to Linux and am taking a course in it. Very excited to learn more. I am working on a script that asks user for two numbers, then asks whether user wants to add or subtract. I failed the ...
In Bash and Dash, using quotes in an Arithmetic Expansion is illegal: $ bash -c 'x=123;echo $(("$x"))' bash: "123": syntax error: operand expected (error token is ""123"") $ dash -c 'x=123;echo $(("$...