15 lines
410 B
JavaScript
15 lines
410 B
JavaScript
/* Prompt:
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Generate a JavaScript function that calculates the factorial of a number.
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The function should be named 'factorial' and take one parameter 'n'.
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Return only the function code, no explanation.
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*/
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function factorial(n) {
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if (n < 0) return undefined;
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if (n === 0 || n === 1) return 1;
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let result = 1;
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for (let i = 2; i <= n; i++) {
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result *= i;
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}
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return result;
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} |