As with almost every programming language, JavaScript treats various types of values differently. A string like “Hello world” is very different from a number like 42. But what types are available, and ...

Problem: Many JavaScript functions don't explicitly check for null or undefined input values. When these values are passed unexpectedly, it can cause errors such as TypeError: Cannot read properties ...

While it explicitly checks for null and returns 0, it doesn't account for cases where either a or b might be undefined, resulting in unexpected behavior or errors. Bug-Hunter-X / ...