Calculate factorial

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    Giovanny Gongora

    Codiga's TypeScript Recipes

    Calculates the factorial of a number.

    const factorial = (n: number) =>
      n < 0
        ? (() => {
            throw new TypeError('Negative numbers are not allowed!');
          })()
        : n <= 1
        ? 1
        : n * factorial(n - 1);
    
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