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Functional Programming with ReasonML

Solution Review: The Factorial of a Number

Explore how to define recursive functions by implementing the factorial of a number in ReasonML. This lesson guides you through handling base cases and recursive calls using switch expressions to deepen your understanding of function recursion.

We'll cover the following...
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Reason
let rec fact = (n: int) => {
  /* Check if n is 0 or 1 */
  switch (n) {
    | 0 => 1; /* Base case */
    | n => n * fact(n - 1) /* Make recursive calls and multiply each time */
  };
};
Js.log(fact(5));
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