parseInt method for javascript

Question

Tried searching online why it does this. I tried changing the redix of the parseInt method but it doesn't seem to change anything as well.

var sum = [6, 1, 4, 5, 3, 9, 0, 1, 9, 5, 1, 8, 6, 7, 0, 5, 5, 4, 3]

// digits.length returns 19
var wholeNumber = sum.join("")
var makeNum = parseInt(wholeNumber)
console.log(wholeNumber) // returns string: 6145390195186705543
console.log(makeNum); // returns int: 6145390195186705000

Can anyone explain why makeNum does not return me the integer of wholeNumber but rather replaces the last 3 digits at the back with zeroes. I t

since that number is bigger than `Number.MAX_SAFE_INTEGER`, you could use `BigInt(wholeNumber)` — Jaromanda X, May 16 '20 at 07:15
makeNum returns an array list that number is bigger than an int u need to rethink what ur doing u if u want the sum of the values or concatenate them — mohamed lahsoumi, May 16 '20 at 07:18

score 1 · Accepted Answer · answered May 16 '20 at 07:13

1

That number is higher than the limit of an int. The max number you can use is 9007199254740991 6145390195186705543 is way larger.

answered May 16 '20 at 07:13

Joel Hager

2,990
3
15
44

is there a way then for me to make it into an integer? I want to subtract a number from it – Samuel Huang May 16 '20 at 07:17
For mathematical operations, or just for a string value? – Joel Hager May 16 '20 at 07:19
Forgot we were talking JS. Derp. You can also use a library like big.js – Joel Hager May 16 '20 at 07:22

parseInt method for javascript

1 Answers1