Functions act as placeholders for the data they output. Basically, you can assign the output of a function to a variable, just like any normal data.The core concept of this lesson is to learn how to call a function and assign the return value to a variable. The compareEquality function in the editor compares two values using the equality operator. When we have variables and we're assigning it to a value what's the saying is that whenever we have a whatever is on the right of the equal sign. Call the function and save the return value of that very call. One of the things I wanted to change was to turn the assignment operator into an assignment command, removing the ability to make use of the returned value. The assignment ( = ) operator is used to assign a value to a variable or property. The assignment expression itself has a value, which is the assigned value. FreeCodeCamp offers a curriculum and in this video we cover their lesson called Assignment with a Returned Value.