I am getting the boolean values that I want in console but I am also getting undefined after each boolean output. Why is this the case?

JavaScript
1 
function hasPassingGrade(score) {
  switch (true) {
    case score > 59 :
        console.log("true");
        break
    case  score < 59 :
        console.log("false")

  }
  
}


console.log(hasPassingGrade(100));
console.log(hasPassingGrade(53));
console.log(hasPassingGrade(87));
``
2

undefined is the default value returned by functions in JavaScript. The true/false that’s output to the console, is from the within function - the console.log("true") or console.log("false"). Then is printed undefined since function doesn’t return anything.

3

Please post your questions in the body of your post instead of just the title.

4

You’re seeing undefined because your function hasPassingGrade does not return anything; it only logs values. JavaScript functions implicitly return undefined if no return statement is used.

Fix it by returning the boolean values instead of logging them:

removed

Now, console.log prints only the boolean values.

#happycoding JavaScript Code Feedback

5

Welcome to the forum :wave:

Please do not share solution code.

1 Like