Gain insights into Infrastructure as Code with Terraform, sharpen your skills, and prepare for the HashiCorp Terraform Associate certification in a cloud-agnostic way.

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This course is designed to help learners obtain the Terraform Associate certification from HashiCorp. 

You’ve likely picked up this course because you dabbled in Terraform as a hobbyist or in a
development environment, and you’re excited about the possibilities of deploying Infrastructure 
as Code (IaC). It will enable you to sharpen your skills and prove your knowledge with a certification from HashiCorp. Terraform is an amazing tool to deploy Infrastructure as Code in a cloud-agnostic way. We’re excited to share our accumulated knowledge with you through this course.

HashiCorp Terraform Certified Associate Preparation Guide


The format of data returned by data sources and resources may not be in the format we need to pass to another resource. We may also want to transform outputs from a module, combine variables, or read in file data. Terraform offers built-in functions to perform many of these tasks. There are nine different function categories:



![](/api/collection/10370001/6444696643043328/page/6057256459698176/image/4892349490003968?page_type=collection_lesson)

* Numeric
* String
* Collection
* Encoding
* Filesystem
* Date and time
* Hash and crypto
* IP network
* Type conversion

We aren’t going to go into all the different functions in each category. If you’d like to know more, we suggest reading the official Terraform documentation. That being said, the important thing here is to understand how to invoke a function in the Terraform configuration and how to test a function using the Terraform console.

# Format of functions

Functions have the basic format of `function(arguments,...)`. If you’ve done any programming, this should feel pretty familiar. The data type of the argument is governed by the function. Let’s look at a few examples:

+ In `max(number, number,...)`, `max` returns a number that’s the largest value of the given set.

+ In `lower(string)`, `lower` returns a string in all lowercase based on the submitted string.

+ In `keys(map)`, `keys` returns a list of the keys in the given map.


Each function takes arguments of specific types and returns a specific type value. We can also combine functions. For example, `abs(min(1, -10, 5))` would first find the smallest value and then return the absolute value.

# Test the function output



Learn about Terraform built-in functions that can be used to write configuration.

Introduction to the Course

Introduction to Infrastructure as Code

Basics of Terraform

Outside the Workflow: Using the Terraform CLI

Terraform Modules

Navigate Terraform Workflow

Implement and Maintain State

Read, Generate, and Modify Configuration

Understand Terraform Enterprise Capabilities

Conclusion

Terraform Built-in Functions to Write Configuration