Declare a new array in JavaScript with a var as its size

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totally new to JS but need to use it atm.

In C language I can declare new arrays the following way: int A[10], B[A];

This way I can create custom sized arrays of a variable.

Is it possible to do the same with JavaScript? I need to make an Array with the size of a variable.
I tried to do stuff like: var n = 10; var A = new Array(n); but it just doesn’t work.
Thanks.

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