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HCL Foundations

terraform block required_providers provider configuration resource block data source input variable local values output value

Expressions

for expression conditional expression splat expression dynamic block count for_each depends_on lifecycle block

State and Modules

backend configuration remote state data source module block module outputs moved block import block terraform workspace state locking concept

Production Infrastructure

aws_vpc resource aws_subnet resource security group rules aws_instance resource templatefile function sensitive variable validation block precondition

Terraform / Expressions

for expression

Learn for expression in Terraform through a focused explanation, a topic-specific example, an engineering warning, and a mastery check.

12 min read • Intermediate

terraform-009.tf

hcl

locals { upper_names = [for n in var.names : upper(n)] }

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

for expression Mastery Check →

conditional expression