> For the complete documentation index, see [llms.txt](https://developerf1.gitbook.io/javascript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developerf1.gitbook.io/javascript/docs/random.md).

# Random

JavaScript Randomization examples

***

## Random number in a range

Generate a random number in a range. [Source](https://javascriptf1.com/snippet/generate-a-random-number-in-a-range-with-javascript)

* Example:

  ```javascript
  function getRandumNumber(min, max) {
      return Math.floor(Math.random() * (max - min + 1) + min);
  }
  ```

***

## Random number with fixed length

Generate a random number with fixed length. [Source](https://javascriptf1.com/snippet/generate-a-random-number-with-fixed-length-using-javascript)

* Example:

  ```javascript
  function getRandumNumber(length) {
      const min = Math.pow(10, (length-1));
      const max = Math.pow(10, (length));
      return Math.floor(Math.random() * (max - min) + min);
  }
  ```

***

## Random string

Generate a random string. [Source](https://javascriptf1.com/snippet/generate-random-string-in-javascript)

* Example:

  ```javascript
  function getRandomString(length) {
    const allowedCharacters = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    const allowedCharacterLength = allowedCharacters.length;

    let result = '';

    for ( let i = 0; i < length; i++ ) {
      result += allowedCharacters.charAt(Math.floor(Math.random() *  allowedCharacterLength));
    }

    return result;
  }
  ```

***

## Random UUID

Generate a random UUID. [Source](https://javascriptf1.com/snippet/generate-uuid-in-javascript)

* Example:

  ```javascript
  function getUUID() {
    return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
        (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
    );
  }
  ```

***

## Random color

Generate a random color. [Source](https://javascriptf1.com/snippet/generate-random-color-with-javascript)

* Example:

  ```javascript
    function getRandomColor() {
        const availableCharacters = '0123456789ABCDEF';
        const availableCharacterLength = availableCharacters.length;

        let color = '#';
    
        for (let i = 0; i < 6; i++) {
          color += availableCharacters[Math.floor(Math.random() * availableCharacterLength)];
        }
    
        return color;
    }
  ```

***

## Random date

Generate a random date. [Source](https://javascriptf1.com/snippet/generate-random-date-with-javascript)

* Example:

  ```javascript
    function getRandomDate() {
        const maxDate = Date.now();
        const timestamp = Math.floor(Math.random() * maxDate);
        return new Date(timestamp);
    }
  ```

***

## Random date in a range

Generate a random date in a range. [Source](https://javascriptf1.com/snippet/generate-random-date-in-a-range-with-javascript)

* Example:

  ```javascript
    function getRandomDate(startDate, endDate) {
        const minValue = startDate.getTime();
        const maxValue = endDate.getTime();
        const timestamp = Math.floor(Math.random() * (maxValue - minValue + 1) + minValue);
        return new Date(timestamp);
    }
  ```

***