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What does ! mean?


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! on its own by default with boolean variable like if(!something) would check if value is NOT true (I.E false), adding second if(!!something) would reverse previous comparison to check value IS true, so as you add more exclamation marks it would give opposite comparison to previous, NOT true, IS true, NOT true and so on....



if(!something) //not true




if(something) // is true


would suffice

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