Undefined und Null - Datentypen für 'nichts' in JavaScript - JavaScript Tutorial 09 - Deutsch

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Manchmal müssen wir ausdrücken, dass wir etwas nicht kennen, nicht wissen oder dass etwas einfach noch nicht entschieden ist. Das ist auch in der Programmierung so. Deshalb gibt es in JavaScript die beiden Datentypen null und undefined, um "nichts" auszudrücken. Warum es zwei davon gibt und was sie ausmacht und unterscheidet, erfahrt ihr in diesem Video.
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