Start of main content
## Recommended snippets & collections

The increment operator (`++`

) adds `1`

to its operand and returns a value. Similarly, the decrement operator (`--`

) subtracts `1`

from its operand and returns a value. Both of these operators can be used either prefix (`++i`

, `--i`

) or postfix (`i++`

, `i--`

).

If used prefix, the value is incremented/decremented, and the value of the expression is the updated value.

```
let i = 0; // i = 0
let j = ++i; // i = 1, j = 1
let k = --i; // i = 0, k = 0
```

If used postfix, the value is incremented/decremented, and the value of the expression is the original value.

```
let i = 0; // i = 0
let j = i++; // i = 1, j = 0
let k = i--; // i = 0, k = 1
```

### JavaScript Interview Questions

Snippet collection

Prepare for your next JavaScript interview with this collection of interview questions and answers.

### Integer to roman numeral

JavaScript, Math

Converts an integer to its roman numeral representation. Accepts value between

`1`

and`3999`

(both inclusive).### Hamming distance

JavaScript, Math

Calculates the Hamming distance between two values.

### Euclidean distance

JavaScript, Math

Calculates the distance between two points in any number of dimensions.