What happens if we add an `n`

suffix to a regular number in JavaScript? What’s the output?

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In the first line we try to add two numbers. These aren’t regular numbers, but rather two instances of `BigInt`

— special objects that are used to safely represent numbers bigger than `Number.MAX_SAFE_INTEGER`

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There are two ways to create `BigInt`

:

- add a suffix
`n`

to any number in JavaScript

```
const big = 1000000n; // 1000000n
```

- call the constructor
`BigInt(val)`

and pass in a numerical value

```
const bigN = BigInt(123) // 123n
```

This value doesn’t have to a number. I can be a string.

```
const bigS = BigInt("234") // 234n
```

You can also use hex and binary notation.

```
const bigHex = BigInt("0xffffffffffffffff") // 18446744073709551615n
const bigBin = BigInt("0b111") // 7n
```

The `BigInt`

numbers behave just like the regular ones. By adding `1n`

and `2n`

we get `3n`

. This is `BigInt`

as well, and `typeof 3n`

returns a string `bigint`

, which will be logged to the screen when we call `console.log`

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**ANSWER**: The `n`

suffix turns a regular JavaScript number into a `BigInt`

. The string `bigint`

will be logged to the console.

## Top comments (2)

Thanks for posting so many of these handy articles! I actually didn't know about the 'n' suffix, so this was a particularly helpful one for me.

I'm glad you liked it, Cooper. I'll be posting more of the same 🚀