Terraform Strings: Interpolation, Multiline & Built-in Functions

In this article, we discuss strings in Terraform, including their definition, interpolation, manipulation with built-in functions, and concatenation. Strings are a fundamental data type used to define configuration values in Terraform. They can be defined using quoted or heredoc syntax. Interpolation allows for dynamic insertion of values from variables, resource attributes, or function calls into strings. Terraform provides several built-in string functions such as base64decode(), join(), regex(), replace(), split(), lower(), substr(), and trim(). These functions enable manipulation and transformation of string values within configurations. Concatenation can be achieved using either string interpolation with ${} or the join() function.