48 lines
779 B
JavaScript
48 lines
779 B
JavaScript
function add(a, b) {
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return a + b;
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}
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function subtract(a, b) {
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return a - b;
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}
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function sum(array) {
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return array.reduce((current, total) => total + current, 0);
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}
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function multiply(array) {
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return array.length
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? array.reduce((accumulator, nextItem) => accumulator * nextItem): 0;
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}
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function power(a, b) {
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return Math.pow(a, b);
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}
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function factorial(n) {
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if (n == 0) return 1;
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let product = 1;
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for (let i = n; i > 0; i--) {
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product *= i;
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}
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return product;
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}
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// This is another implementation of Factorial that uses recursion
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// THANKS to @ThirtyThreeB!
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function recursiveFactorial(n) {
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if (n===0){
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return 1;
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}
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return n * recursiveFactorial (n-1);
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}
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module.exports = {
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add,
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subtract,
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sum,
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multiply,
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power,
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factorial
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};
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