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What’s `b` after this runs? let a = 10; let b = a; a = 0; It’s 10. Even though I had gotten it right, I couldn’t have explained why. @danabra.mov and @maggieappleton.com’s course, Just JavaScript, helped me develop a better mental model of how it works and now it's free. justjavascript.com/learn

justjavascript.comJust JavaScriptJust JavaScript will help you develop a rock-solid understanding of how JavaScript works through intuitive visual explanations and learning challenges.

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