More 'concept' code

concept-code/factorial.ts

@@ -0,0 +1,11 @@
+export default function main(n) {
+  return factorial(+n);
+}
+
+function factorial(n) {
+  if (n === 0) {
+    return 1;
+  }
+
+  return n * factorial(n - 1);
+}

concept-code/projEuler1.ts

@@ -0,0 +1,11 @@
+export default function main() {
+  let sum = 0;
+
+  for (let i = 0; i < 1000; i = i + 1) {
+    if (i % 3 === 0 || i % 5 === 0) {
+      sum = sum + i;
+    }
+  }
+
+  return sum;
+}