Whenever I run this, the number returned gets incremented, can anyone explain this to me?
let array = [9, 2, 2, 3, 3, 7, 2, 0, 3, 6, 8, 5, 4, 7, 7, 1]
return Number(array.join(''))
Outputs:
9223372036854772
The number is larger than Number.MAX_SAFE_INTEGER
(2 53 -1). You may want to use BigInt
instead.
Example:
let array = [9, 2, 2, 3, 3, 7, 2, 0, 3, 6, 8, 5, 4, 7, 7, 1] let num = BigInt(array.join('')); console.log(num.toString()); console.log("Doubled:", (num * 2n).toString()); console.log("Squared:", (num ** 2n).toString());
You can use Number.isSafeInteger
to check if a value is precise.
let array = [9, 2, 2, 3, 3, 7, 2, 0, 3, 6, 8, 5, 4, 7, 7, 1] let num = Number(array.join('')); console.log("Safe?", Number.isSafeInteger(num));
The result of array.join('')
is "9223372036854772"
. That is much larger than Number.MAX_SAFE_INTEGER
. Number
constructor can't precisely hold numbers greater than Number.MAX_SAFE_INTEGER
, and therefore you get this error. You might want to use something like a BigInt
for handling such large numbers.
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