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When you type code or comments, GitHub Copilot suggests the next line of code. But it’s not only a single word or line of code. GitHub Copilot can suggest complete methods, boilerplate code, whole unit tests, and even complex algorithms.

Since the launch of GitHub Copilot technical preview last year, it’s become abundantly clear that AI is one of the best tools to empower the next generation of developers. Already, AI is acting as a copilot in our daily lives. It’s helping us write emails and essays, automatically generate photo albums of our loved ones, and even acts as a digital assistant to help us order groceries. But until now, AI has stopped short of improving code, leaving the process of developing software almost completely manual. That’s changing now. Now GitHub Copilot is generally available to individual developers.

Guard clauses are a practical way to write cleaner functions by handling the unwanted cases first. Instead of nesting your entire function inside a stack of if conditions, you check for the early exits up front - returning or throwing as needed - and move on. It's a habit that keeps code flatter and easier to read. The structure becomes simpler, and it’s immediately clear what the function does and under what conditions it doesn’t even bother.