57.3 Practice Salary increase

Question

Hello everyone,

Can someone find the error on the following code? While i get the correct result , it returns also an undefined entry and i don't know why.
1500
undefined

The code is here:
function main() {
var percent = parseInt(readLine(),10);

console.log(salaryIncrease(percent));
}
var salaries = [3000, 7000, 5000, 15000];
const salaryIncrease = percent => {
//your code goes here
let salary=0;
salaries.forEach(budget => {
budget=budget*percent/100;

salary=salary+budget;

})

console.log(salary);
}

Thanks in advance for your help.

Answer 1

i found another post where instead of console.log he used return and my code is successful now . I don't understand though why console.log returns and undefined entry apart from the correct result:

https://www.sololearn.com/Discuss/2901093/javascript-57-3-practice-salary-rise

Answer 2

Because the console.log in the main function get nothing for its function‘s parameter.

That means you should first observe / note how will be called the salaryIncrease function. For this reason this function should return a value.