URLs do not directly allow spaces. When writing or generating URLs, specific encoding methods must be employed to handle spaces and other special characters. This encoding is commonly known as URL encoding or percent-encoding.
For example, if you want to include a phrase such as 'hello world' in a URL, you cannot directly write it as:
https://example.com/hello world
This is because spaces may be misinterpreted by browsers or servers, leading to incorrect handling of the URL. The correct approach is to convert spaces to %20, which is the URL-encoded representation of a space. Therefore, the correct URL should be:
https://example.com/hello%20world
In practical applications, most programming languages provide libraries or functions to automatically handle this encoding, ensuring the validity and security of URLs. For example, in Python, you can use the urllib.parse.quote function to automatically perform this conversion.