Terraform: count, for_each, and for loops

In the previous post, we got an overview of the Terraform data types — Terraform: introduction to data types — primitives and complex.

Now let’s see how these types can be used in loops.

Terraform supports three types of cycles:

count: the simplest, used with a given number or with a function length(); uses indexes from a list or map for iteration
suitable for creating identical resources that will not change
for_each: has more options, used with a map or set, uses sequence key names to iterate
suitable for creating resources of the same type, but with the ability to set different parameters
for: used to filter and transform objects with lists, sets, tuples or maps; can be used in conjunction with operators and functions lie if, join, replace, lower, orupper

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