export default and its uses. To import a default export, you need to use a different import syntax. In the following example, add is the default export of the math_functions.js file. Here is how to import it:
```js
import add from "./math_functions.js";
```
The syntax differs in one key place. The imported value, add, is not surrounded by curly braces ({}). add here is simply a variable name for whatever the default export of the math_functions.js file is. You can use any name here when importing a default.
math_functions.js file, found in the same directory as this file. Give the import the name subtract.
subtract from math_functions.js.
testString: assert(code.match(/import\s+subtract\s+from\s+('|")\.\/math_functions\.js\1/g));
```