Function that takes a number as an argument and returns a boolean javascript

Question

I am new to coding and I have this exercise where I have to write a function that takes a number as argument and returns a boolean. This is the code I wrote but is not working and I am getting the warning

"The function should only have a return statement in its body. You can evaluate a boolean expression an return immediately its value"

var even = function(x) {
  if ((x % 2) === 0) {
    return true;
  } else
    return false;
};

Answer 1

The response you get from the code submission has an important point:

The expression (x%2)===0 is already a boolean, so you can return that expression:

return x%2 === 0;

In general you should avoid this pattern:

if (some_boolean_expression) {
    return true;
} else {
    return false;
}

... since the boolean you return is exactly the same as the boolean expression that is evaluated in the if condition. So it should be just:

return some_boolean_expression;