Goal: In the Data Types lesson, we learned:
- 5 data types - number, string, boolean, undefined, null
- Methods are generally specific to a data type
- How to use
typeof to check data type
- How to use
parseInt() and .toString() to convert between numbers and strings
Explore these different data types and their corresponding methods by completing the exercises listed below.
Warm Up
- What data type is
NaN? What about Infinity?
- How do we tell what data type something is?
- Name one way to convert something of one data type into another data type.
Code
Data Types Practice
Practice checking and converting data types by doing the following:
- Set a variable equal to your favorite number and check the data type.
- Then, create a new variable converting the previous variable to a string. Check the data type again.
- Next, create a third variable, converting this string variable back to a number. Check the data type one more time.
- Compare the first and third variables using
=== to confirm that they are equal.
- Compare the first and second variables or second and third variables to confirm that they are NOT equal.