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JavaScript Object-Oriented JavaScript: Challenge Adding the Game Logic Build the updateGameState() Method

Posted by Joseph Michelini
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Joseph Michelini
Python Development Techdegree Graduate 18,692 Points

How does the not ! operator know if the outcome of checkForWin() is true or false?

I understand that inside checkForWin() there is a variable called win that starts out false and changes to true under certain conditions, but without the function explicitly returning the value of win, how does the ! operator know to check the win variable specifically? What if I had more than one variable with a boolean value in the function?

I'm asking specifically because I'm wondering how I can use the ! operator with other functions, and what kind of information is being implicitly read and returned here for the ! operator to act on.

Thank you!

1 Answer

Steven Parker
Steven Parker
240,995 Points
Steven Parker
Steven Parker
240,995 Points

The function does return the value explicitly. The very last statement of the function shown in the instruction is:

    return win;
Joseph Michelini
.a{fill-rule:evenodd;}techdegree seal-36
Joseph Michelini
Python Development Techdegree Graduate 18,692 Points

Oh man it most definitely does. I was a little lost in the program and somehow missed exactly what I was looking for. Sort of like looking for your keys when you're trying to leave the house. Thank you Steven!