Add loops examples in src/01-intro/03-loops.js

Author: loiane

src/01-intro/03-loops.js

@@ -0,0 +1,41 @@
+// Path: src/01-intro/04-loops.js
+
+console.log('**** for example ****');
+/* for - example */
+for (let i = 0; i < 10; i++) {
+  console.log(i);
+}
+
+console.log('**** while example ****');
+/* while - example */
+let i = 0;
+while (i < 10) {
+  console.log(i);
+  i++;
+}
+
+console.log('**** do-while example ****');
+/* do-while - example */
+i = 0;
+do {
+  console.log(i);
+  i++;
+} while (i < 10);
+
+console.log('**** for-in example ****');
+/* for-in - example */
+const obj = { a: 1, b: 2, c: 3 };
+for (const key in obj) {
+  console.log(key, obj[key]);
+}
+// output: a 1 b 2 c 3
+
+console.log('**** for-of example ****');
+/* for-of - example */
+const arr = [1, 2, 3];
+for (const value of arr) {
+  console.log(value);
+}
+// output: 1 2 3
+
+// to see the output of this file use the command: node src/01-intro/04-loops.js