I've seen

const num = 123456789000000000000n;

And don't know what the n at the end of numeric literal does?

At the time of writing, when searching online for "What does character 'n' after numeric literal mean in JavaScript" nothing comes up.

I've seen

const num = 123456789000000000000n;

And don't know what the n at the end of numeric literal does?

At the time of writing, when searching online for "What does character 'n' after numeric literal mean in JavaScript" nothing comes up.

• javascript
• literals
• bigint

1 Answer 1

From BigInt on MDN:

A BigInt is created by appending n to the end of an integer literal — 10n — or by calling the function BigInt().

In essence, BigInt allows for storing large integers, as otherwise a large numeric literal would be converted into a floating point and lose precision of the least significant digits.