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what even is this JavaScript syntax and whatamp;#39;s it going to Output so we have const a which we set equal to one two three but these are parentheses this is not an array and then we have console log of a so I might think okay maybe this is like an array maybe itamp;#39;s some kind of Tuple or something like that but nope thatamp;#39;s not what it is itamp;#39;s just JavaScript so in this case whatamp;#39;s happening is this is known as the comma operator so weamp;#39;re actually going to get three and what happens when you use the comma operator which just allows you to have multiple comma separated Expressions they are all going to execute so if this was some function call that call would actually execute but then itamp;#39;s just going to return the last value which in this case is the 30 so thatamp;#39;s why a is set to 3.
