[Verse 1] Let me tell you about functions in Rust They're the building blocks that we can trust Start with fn and give it a name Parameters inside help you play the game Return types come after the arrow sign Write your logic and make it shine [Chorus] Functions take you in and out Control the flow without a doubt If and else will guide your way Match expressions save the day Loop it up or break it down Rust control keeps you safe and sound [Verse 2] If statements check what's true or false No parentheses needed, that's the boss Else if chains can help you choose Match is powerful, you just can't lose Every arm must be covered well Exhaustive matching casts its spell [Chorus] Functions take you in and out Control the flow without a doubt If and else will guide your way Match expressions save the day Loop it up or break it down Rust control keeps you safe and sound [Bridge] Loop forever or while it's true For each item, iterate through Break will exit, continue skips Return values from function trips Ownership rules still apply here Borrow checker keeps it clear [Verse 3] Function signatures tell the tale What goes in and what won't fail Unit type when nothing's returned Stack frames managed, memory earned Call your functions, pass them around Modular code that's safe and sound [Chorus] Functions take you in and out Control the flow without a doubt If and else will guide your way Match expressions save the day Loop it up or break it down Rust control keeps you safe and sound [Outro] From main function we begin Control structures help us win Safe and fast, that's Rust's way Functions flowing every day
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