**Tell us what’s happening:**

I’m completely lost on this one.

What is a radix?

What is the base of a number?

What does the following line mean?

The radix variable says that “11” is in the binary system, or base 2. This example converts the string “11” to an integer 3.

**Your code so far**

```
function convertToInteger(str) {
return parseInt(str, 2);
}
convertToInteger("10011");
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36`

.

**Link to the challenge:**

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function-with-a-radix