I’m following along examples in a book and I’m getting an error which doesn’t make sense because when I try the suggested solution in the help, I get the same error.
defmodule Checkout do def total_cost(price, tax_rate) when price >= 0 and tax_rate >= 0 do tax_rate = tax_rate +1 price * tax_rate end end iex(2)> c "test.ex" == Compilation error in file test.ex == ** (CompileError) test.ex:8: "tax_rate +1" looks like a function call but there is a variable named "tax_rate". If you want to perform a function call, use parentheses: tax_rate(+1) If you want to perform an operation on the variable tax_rate, use even spaces instead: tax_rate + 1 ** (CompileError) compile error (iex 1.10.2) lib/iex/helpers.ex:200: IEx.Helpers.c/2
The same error when I try:
defmodule Checkout do def total_cost(price, tax_rate) when price >= 0 and tax_rate >= 0 do price * tax_rate +1 end end