ABC's 20/20 is the prime time news magazine program featuring co-anchors Amy Robach and David Muir. From newsmaker interviews, hard-hitting investigative reports, exclusives, compelling features ...
20 is a tetrahedral number as 1, 4, 10, 20.; 20 is the basis for vigesimal number systems.; 20 is the third composite number comprising the product of a squared prime and a prime, and also the second member of the (2 2)q family in this form.
The %20 and %30 in a URL you are referring to is what’s known as URL encoding converts. URL encoding converts characters into a format that can be transmitted over the Internet. URL Encoding (Percent Encoding) URLs can only be sent over the Internet using the ASCII character-set. Since URLs often ...
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From Wikipedia (emphasis and link added):. When data that has been entered into HTML forms is submitted, the form field names and values are encoded and sent to the server in an HTTP request message using method GET or POST, or, historically, via email.
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"20/20," in my opinion, is a good news magazine show. During the time he was on the air, I enjoyed seeing Hugh Downs as the co-anchor. When he retired in 1994, I was really sad.
I am interested in knowing why '%20' is used as a space in URLs, particularly why %20 was used and why we even need it in the first place.
The specification for URLs (RFC 1738, Dec. '94) poses a problem, in that it limits the use of allowed characters in URLs to only a limited subset of the US-ASCII character set:
It means space. Space is not a valid character in an URL. So it is escaped using a specific string of characters. This form of encoding is called URL Encoding. Not only space, a lot other characters such as @ and / carry special meaning in URLs an...