# Summary

- **Textual Data** is always enclosed in single or double quotation marks.  
  For example: `'Hello World'` or `"Hello World"` — both represent valid textual data;

- There are two different types of **numbers in JavaScript**:
  - **Integers**;
  - **Floating-Point Numbers**;

- **Floating-Point Numbers** (also known as *Floats*) are numerical values that have a decimal part.  
  Examples: `1.234`, `24.56`, `3.1415`, etc;

- **Negative numbers** can be expressed by adding a minus (`-`) sign before the number. 
  Examples: `-27`, `-3.14`, `-123`, etc;

- **Arithmetic Operations** can be performed on numbers using the following operators:  
  `+`, `-`, `*`, `/`, and `**`;

- The order of arithmetic operations follows the **BODMAS** or **PEMDAS** rule;


Which of the following is the correct way to represent textual data in JavaScript?

Which of the following is **NOT** a valid number type in JavaScript?

Which of the following represents a Floating-Point Number in JavaScript?

Which of the following represents a negative number in JavaScript?

How would you multiply two numbers in JavaScript?

In this section, we will get an introduction to JavaScript by looking at the basic syntax of the language, along with a few terms and concepts which will build our foundation for learning more advanced features of the language in the upcoming section. This section will include hands-on tasks which will help you practice all the concepts and remember the contents naturally without effort.

In this section, we will look at how to store some data and retrieve it later on using Variables. Moreover, we will explore some basic data types and look at how they interact with each other.

In this chapter we will look at how to write expressions which evaluate to "true" or "false" based on the conditions, for example "Is X equal to Y?". Afterwards, we will build on that concept and learn to write "Conditional Statements" which will enable us to conditionally execute specific lines of code.

Introduction to JavaScript

Numbers

Summary

1. Which of the following is the correct way to represent textual data in JavaScript?

2. Which of the following is NOT a valid number type in JavaScript?

3. Which of the following represents a Floating-Point Number in JavaScript?

4. Which of the following represents a negative number in JavaScript?

5. How would you multiply two numbers in JavaScript?