new class js -advanced

02_advanced/MATERIAL/advanced-js/lesson_02/solutions/combinations/index.js

@@ -0,0 +1,19 @@
+function combinations(n, k) {
+  // Base Cases
+  if (k === 0 || k === n) {
+    return 1;
+  }
+  // If k is greater than n, there are no combinations
+  if (k > n) {
+    return 0;
+  }
+  // Recursive Cases
+  return combinations(n - 1, k - 1) + combinations(n - 1, k);
+}
+
+// Test Cases
+console.log(combinations(5, 2)); // => 10
+console.log(combinations(6, 3)); // => 20
+console.log(combinations(4, 0)); // => 1
+console.log(combinations(4, 4)); // => 1
+console.log(combinations(5, 6)); // => 0