Add conditionals examples in src/01-intro/02-conditionals.js

Author: loiane

src/01-intro/02-conditionals.js

@@ -0,0 +1,48 @@
+// Path: src/01-intro/03-conditionals.js
+
+/* Example 01 - if-else */
+let number = 0;
+if (number === 1) {
+  console.log('number is equal to 1');
+} else {
+  console.log('number is not equal to 1, the value of number is ' + number);
+}
+
+/* Example 02 - ternary operator - if..else */
+if (number === 1) {
+  number--;
+} else {
+  number++;
+}
+
+// is the same as
+number === 1 ? number-- : number++;
+
+/* Example 03 - if-else-if-else... */
+let month = 5;
+if (month === 1) {
+  console.log('January');
+} else if (month === 2) {
+  console.log('February');
+} else if (month === 3) {
+  console.log('March');
+} else {
+  console.log('Month is not January, February or March');
+}
+
+/* Example 05 - switch */
+switch (month) {
+  case 1:
+    console.log('January');
+    break;
+  case 2:
+    console.log('February');
+    break;
+  case 3:
+    console.log('March');
+    break;
+  default:
+    console.log('Month is not January, February or March');
+}
+
+// to see the output of this file use the command: node src/01-intro/03-conditionals.js