work

1-js/3-object-basics/1-object/3-sum-object/solution.md

@@ -0,0 +1,17 @@
+
+
+```js run
+let salaries = {
+  John: 100,
+  Ann: 160,
+  Pete: 130
+}
+
+let sum = 0;
+for(let key in salaries) {
+  sum += salaries[key];
+}
+
+alert(sum); // 390
+```
+

1-js/3-object-basics/1-object/3-sum-object/task.md

@@ -0,0 +1,19 @@
+importance: 5
+
+---
+
+# Sum object properties
+
+We have an object storing salaries of our team:
+
+```js
+let salaries = {
+  John: 100,
+  Ann: 160,
+  Pete: 130
+}
+```
+
+Write the code to sum all salaries and store in the variable `sum`. Should be `390` in the example above.
+
+Use `for..in` loop to iterate over the object.