Answer
The params keyword allows passing a variable number of arguments to a method without explicitly creating an array.
Quick Answer
params lets you pass a variable number of arguments without wrapping them in an array. The method receives them as an array, but callers write Sum(1, 2, 3) instead of Sum(new int[] { 1, 2, 3 }). Must be the last parameter in the signature, and only one params per method.
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Verified Answer
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Source: SugharaIQ