JavaScript Challenge - Change Please

This community-built FAQ covers the “Change Please” code challenge in JavaScript. You can find that challenge here, or pick any challenge you like from our list.

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Used recursion:

const changeOptions = (i, c) => {
// i = inputMoney, c = coins
if (i === 0) return 1; // base1 (valid)
if (c.length === 0 || i < 0) return 0;
// base2 (invalid cases)
return changeOptions(i-c[0], c) + changeOptions(i, c.slice(1, c.length));

console.log(changeOptions(5, [1, 2, 5, 10, 100])); // should be 4
console.log(changeOptions(20, [1, 2, 5, 10, 20, 100])); // should be 41
console.log(changeOptions(100, [1, 2, 20, 100])); // should be 157
console.log(changeOptions(100, [1, 2, 5, 10, 20, 100])); // should be 4112

// Leave this here so we can test your code
module.exports = changeOptions;