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Start your free trialSamantha McElhinney
1,931 PointsI'm not sure why I'm getting the error identifier already defined when I'm reassigning the variable with const
const century20 = years.filter(number => number <= 2000);
const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let century20;
// century20 should be: [1989, 2000, 1999, 1973]
// Write your code below
const century20 = years.filter(number => number <= 2000);
1 Answer
ntm
9,490 PointsI don't think you can change between let
and const
within the same scope of a program. century20
was initialized (with "no value", which I believe evaluates to null
by default) above your code. You no longer need to use the let
or const
keywords on that variable name, or identifier, within this program scope.
It may be clearer to you if it was declared with an initial value, such as let century20 = []
to help mentally track that the variable already exists.