Why does the JS parseInt function behave like this for big Integer numbers?

Asked Jul 22 '19 at 00:19

Active Jul 22 '19 at 00:19

Viewed 23 times

I have a number coming in as a string. When I try to cast it into a number it seems to be rounding it in a weird way. parseInt('10211688549781435') results in 10211688549781436

Similarly playing around with these numbers I get the following answers: parseInt('10211688549781436') results in 10211688549781436
parseInt('10211688549781437') results in 10211688549781436
parseInt('10211688549781438') results in 10211688549781438
parseInt('10211688549781439') results in 1021168854978140

What is causing this behaviour?

asked Jul 22 '19 at 00:19

Ridan

It's too big for JavaScript to handle accurately. Look into BigInt – Jack Bashford Jul 22 '19 at 00:20

Why does the JS parseInt function behave like this for big Integer numbers?

0 Answers0