## Level up with JavaScript - Level 2

In this blog series tutorial, you will be introduced to some of the basic JavaScript programming concepts.

This is geared toward beginners and anyone looking to refresh their knowledge.

Level 2 will cover Uninitialized Variables, Case Sensitive Variables, Adding Numbers, Subtracting Numbers, Multiplying Numbers, and Order of Operations.

### Uninitialized Variables

When a variable is not set to a value, it is defaulted as "undefined". Uninitialized means a variable was declared (i.e. with var, let, or const) and was NOT assigned (=) to a value.

### Case Sensitive Variables

In JavaScript case-sensitivity matters. "LEVEL" is not the same as "level". The best practice is to use all lower case in single word variables.

In multi-word variables use lower case for the first word, and capitalize the first letter of any subsequent words. This is called camelCase.

### Adding Two Numbers

Adding numbers is just as easy as using a (+) between numbers. The results below will show as a comment (// )assigned (number).

### Subtracting Numbers

The same applies with subtraction, but instead, you use (-) between numbers.

### Multiplying Two Numbers

When multiplying numbers we use the (*) operator.

### Order of Operations

JavaScript follows the order of operations. This is the order in which a math problem is solved.

In order of first to last:

- Parentheses
- Exponents
- Multiplication and Division (from left to right)
- Addition and Subtraction (from left to right)

### Thank you for reading my blog! This is the second of my series on JavaScript so if you would like to read more, please follow!

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