Azure Bicep Conditions Loops and What-If Deployments

Real-world infrastructure rarely follows a one-size-fits-all pattern. Different environments need different resources, and teams need to preview changes before deploying them. Azure Bicep provides conditional expressions, for-loops, and what-if analysis to handle these scenarios elegantly. In this hands-on lab, you will use all three features to build dynamic, environment-aware templates and safely preview infrastructure changes before committing them.

You will start by deploying resources conditionally using the Bicep if expression with a boolean parameter. Then you will create multiple storage accounts dynamically using for loops with integer ranges. Next, you will combine conditions and loops to selectively deploy resources from a configuration array, using ternary expressions for environment-specific SKU selection. Finally, you will use az deployment group what-if to preview changes before deploying, learning to interpret the +Create, -Delete, and ~Modify output symbols that show exactly what will happen.

Objectives

Upon completing this intermediate level lab, you will be able to:

• Deploy Azure resources conditionally using the Bicep if expression and parameter-driven logic
• Create multiple resources dynamically using Bicep for loops with integer ranges and arrays
• Combine conditional expressions with loops to selectively deploy resources based on configuration
• Preview infrastructure changes using az deployment group what-if before committing a deployment
• Interpret what-if output symbols (+Create, -Delete, ~Modify) to understand planned changes
• Deploy with --confirm-with-what-if to review and approve changes interactively

Who is this lab for?

This lab is designed for:

• Cloud engineers who want to write dynamic, environment-aware Bicep templates that adapt to different configurations
• DevOps practitioners looking to implement safe deployment practices with what-if preview analysis