FAQ: Data Types - Numbers

This community-built FAQ covers the “Numbers” exercise from the lesson “Variables and Data Types”.

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This exercise can be found in the following Codecademy content:

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FAQs on the exercise Numbers

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What are the first and the second pieces of data in relation to “I’m 20 years old” phrase?

My First day of coding though: As per my understanding there are two pieces of data in this example:1)20-The number and 2) I am 20 years old-The text.

As I interpreted it, the first piece is “20”, and the second piece is “I am 20 years old”.

I interpret the two pieces of data as “20” - which the value can represent - but “old” is not a piece of data that can be represented by a value on the computer. That’s my understanding…don’t know if that’s right.

20 is a counting number. It also represents the value of a numerical state, age. Numbers are not strings, but to represent them in a string we need to cast them to match that data type.

const intro = (name, age) => `My name is ${name} and I am ${age} years old.`;

console.log(intro("Wee Gillis", 19))

The above syntax does all the work under the hood. All ES objects have a .toString() method which gets employed here. The expressions are coerced to String type so no errors are raised. Only a printable string is returned from the function.

My name is Wee Gillis and I am 19 years old.