Terraform code supports three different syntaxes for comments:
- Single-line comments:
#
begins a single-line comment, ending at the end of the line.//
also begins a single-line comment, as an alternative to#
.
- Multi-line comments:
/*
and*/
are start and end delimiters for a comment that might span over multiple lines.
Comments can be placed anywhere in a Terraform configuration file, but they are typically placed at the beginning of a file or before a specific resource. Comments can be used to:
- Document your Terraform code and explain what it does.
- Make your Terraform code more readable and easier to understand.
- Disable or uncomment sections of your Terraform code.
Here are some examples of comments in Terraform code:
# This is a single-line comment.
// This is also a single-line comment.
/*
This is a multi-line comment.
*/
variable "instance_type" {
type = string
description = "The type of EC2 instance to launch."
default = "t2.micro"
}
resource "aws_instance" "example" {
ami = "ami-06984b521991bb600"
instance_type = var.instance_type
tags = {
Name = "My Example Instance"
}
}
Explanation:
#
starts a single-line comment, which ends at the end of the line.//
also starts a single-line comment, as an alternative to#
./*
starts a multi-line comment, and*/
ends it.
The single-line comments in the example are used to document the purpose of the variable
and resource
blocks. The multi-line comment is used to document the tags that will be applied to the EC2 instance.
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