100 exercises to learn Rust

book/src/02_basic_calculator/00_intro.md

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+# A Basic Calculator
+
+In this chapter we'll learn how to use Rust as a **calculator**.  
+It might not sound like much, but it'll give us a chance to cover a lot of Rust's basics, such as:
+
+- How to define and call functions
+- How to declare and use variables
+- Primitive types (integers and booleans)
+- Arithmetic operators (including overflow and underflow behavior)
+- Comparison operators
+- Control flow
+- Panics
+
+Nailing the basics with a few exercises will get the language flowing under your fingers.
+When we move on to more complex topics, such as traits and ownership, you'll be able to focus on the new concepts
+without getting bogged down by the syntax or other trivial details.
+
+## References
+
+- The exercise for this section is located in `exercises/02_basic_calculator/00_intro`