» Expressions Landing Page

To improve navigation, we've split the old Expressions page into several smaller pages.

» Types and Values, Literal Expressions, Indices and Attributes

Terraform's types are string, number, bool, list, tuple, map, object, and null.

This information has moved to Types and Values.

» References to Named Values (Resource Attributes, Variables, etc.)

You can refer to certain values by name, like var.some_variable or aws_instance.example.ami.

This information has moved to References to Values.

» Arithmetic and Logical Operators

Operators are expressions that transform other expressions, like adding two numbers (+) or comparing two values to get a bool (==, >=, etc.).

This information has moved to Operators.

» Conditional Expressions

The condition ? true_val : false_val expression chooses between two expressions based on a bool condition.

This information has moved to Conditional Expressions.

» Function Calls

Terraform's functions can be called like function_name(arg1, arg2).

This information has moved to Function Calls.

» for Expressions

Expressions like [for s in var.list : upper(s)] can transform a complex type value into another complex type value.

This information has moved to For Expressions.

» Splat Expressions

Expressions like var.list[*].id can extract simpler collections from complex collections.

This information has moved to Splat Expressions.

» dynamic Blocks

The special dynamic block type serves the same purpose as a for expression, except it creates multiple repeatable nested blocks instead of a complex value.

This information has moved to Dynamic Blocks.

» String Literals and String Templates

Strings can be "double-quoted" or

<<EOT
heredocs
EOT

Strings can also include escape sequences like \n, interpolation sequences (${ ... }), and template sequences (%{ ... }).

This information has moved to Strings and Templates.