Why Cairo Feels Like Chaos (Until It Doesn’t)
A grounded introduction to StarkNet’s programming language for non-developers and curious builders.
Cairo has a reputation. Ask anyone who has tried it, and you will hear the same thing: it feels confusing at first. That reaction is valid, but it misses the bigger picture.
Cairo is not trying to behave like traditional programming languages.
Most languages give you layers of abstraction. You work with strings, arrays, and objects without thinking too much about how they exist in memory. Cairo strips that away. It reduces everything to a single core unit called a felt, short for Field Element. This is essentially a very large number that can represent many kinds of data.
Even text is not really text. Short strings are encoded into numbers, meaning what looks readable to you is processed numerically by the system.
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Arrays introduce another shift in thinking. Instead of flexible containers, you work with pointers to memory. You define where the array starts and manually assign values. If you attempt to access an index that does not exist, the program fails immediately. There are no safety nets.
One of the most surprising features is the assert statement. In many languages, it is used only for validation. In Cairo, it can also assign values. This dual role reflects the language’s deeper goal: making every step explicit and verifiable.
You will also notice repeated implicit arguments in functions. These are not random. They are part of the internal system that allows Cairo to interact with blockchain state and verify computations efficiently.
The result is a language that feels strict, even uncomfortable. But that discomfort has a purpose.
Cairo is built for zero-knowledge proofs. It prioritizes correctness and verifiability over convenience. Once you understand that, the design starts to make sense.
What feels like chaos at the beginning is actually structure. It just operates at a level most developers are not used to seeing.
About the Writer
Shalom Ogu is a writer exploring the intersections of culture, technology, and digital finance. Writing under House_Of_Defi; his independent platform and X handle; he focuses on making sense of crypto without the noise, translating complex ideas into grounded, human conversations.
