Sum the properties

There is a salaries object with arbitrary number of salaries.

Write the function sumSalaries(salaries) that returns the sum of all salaries using Object.values and the for..of loop.

If salaries is empty, then the result must be 0.

For instance:

          let salaries = {
  "John": 100,
  "Pete": 300,
  "Mary": 250
};

alert( sumSalaries(salaries) ); // 650
        

Open a sandbox with tests.

function sumSalaries(salaries) {

  let sum = 0;
  for (let salary of Object.values(salaries)) {
    sum += salary;
  }

  return sum; // 650
}

let salaries = {
  "John": 100,
  "Pete": 300,
  "Mary": 250
};

alert( sumSalaries(salaries) ); // 650

Or, optionally, we could also get the sum using Object.values and reduce:

          // reduce loops over array of salaries,
// adding them up
// and returns the result
function sumSalaries(salaries) {
  return Object.values(salaries).reduce((a, b) => a + b, 0) // 650
}
        

Open the solution with tests in a sandbox.