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Discover Infrastructure as Code using Terraform. Get job-ready in months, not years by confidently building in-demand skills. Learn HCL, manage resources, and deploy on AWS, Azure, Google Cloud.

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Infrastructure as code (IaC) is a standard practice of maintaining infrastructure configuration as code. Terraform is a cross-platform tool that introduces the HashiCorp Configuration Language (HCL) for the provisioning of infrastructures on different cloud platforms like Azure, AWS, and Google Cloud.

First you’ll learn about the basics of IaC and the tools used for it. Next, you’ll learn about Terraform, how to deploy resources using it, and the Terraform state file. Then you’ll cover the basics of HCL, followed by how to work with outputs, expressions, and loops. You’ll also cover local and remote provisioners, and learn how to employ HCL to provision and manage resources using different concepts like modules, variables, provisioners, and the Terraform state file. Finally, you’ll learn how to use the Terraform Cloud.

By the end of this course, you’ll be able to provision, delete, and update resources on a cloud platform using Terraform. Knowing how to use Terraform effectively will set you up for success.

Infrastructure as Code Using Terraform

# Overview
When working with configuration files, we might need to do some computations. Expressions are used to make configuration flexible and they contain four major building blocks, which are:
- Values
- Variables
- Operators
- Functions 

There are a lot of use cases for Terraform expressions, such as:

- When we need to join or concatenate values together, we can use the `concat()` function.

- When we need to determine the length of a value, we can use the `length()` function.

- When we need to perform mathematical calculations, we can use a range of mathematical operators and numeric functions like `max()`, `min()`, `ceil`, and so on.

- When we need to write conditional statements, we use ternary operators.

- When need to format a value into another value, we use the `slice()` function.

To build expressions, one of the key requirements is operators. Let's examine the various operators that are available for use in Terraform.

## Operators
For mathematical operations, there are three classifications of operators that we can use:
- **Arithmetic operators (**`+`, `-`, `*`, `/`, `%`**):** These are used for performing arithmetic operations.
- **Comparison operators (**`>`, `>=`, `<`, `<=`, `==`, `!=`**):** These are used to compare one value to another.
- **Logical operators (**`&&`, `||`, `!`**):** These are used to combine two expressions together and evaluate if the value is `true` or `false`. 

In the code snippet below, we create a couple of variables using some of the operators mentioned above.

Learn how to calculate values for our resources using expressions.

Getting Started

Infrastructure as Code

The Basics of Terraform

The Basics of the HashiCorp Configuration Language

Terraform Provisioners

Introduction to Terraform Essentials

Manage Infrastructure using Terraform on Google Cloud Platform

Conclusion

Deploying AWS Infrastructure with Terraform

Working with Expressions

Overview