<\/span><\/h2>\nBlank is an empty value.<\/p>\n
When we say something is “blank”, we mean that there is nothing there.\u00a0 What we really mean is a space where SOMETHING could be stored or written.<\/p>\n
Blank means that the specified value exists<\/em> but is empty.<\/p>\nAs an example, when you adopt a puppy, we know that puppies have names, but perhaps you haven’t given it a name yet.\u00a0 The space exists for the puppy’s name, but the name is currently blank.<\/em><\/p>\nBlank is represented by an empty string:\u00a0 “”<\/p>\n
<\/p>\n
<\/span>Empty<\/span><\/h2>\nEmpty is a set with nothing in it.<\/p>\n
A set is a group of similar things, such as letters, numbers, weather temperatures, or airplane velocities.<\/p>\n
A set with nothing in it has no members, and is therefore “empty”<\/p>\n
In math, an empty set looks like this:\u00a0 { }<\/p>\n
<\/p>\n
<\/span>Null<\/span><\/h2>\nNull means that a value exists, but the blank for it hasn’t been created yet.<\/p>\n
For example, some people name their cars, and others don’t.\u00a0 Every car could<\/em> have a name, but perhaps this<\/em> particular car doesn’t have one.\u00a0 This car’s name is a null value.<\/p>\nIn programming, a pointer is initially not pointing to anything, and is said to be “Null”.<\/p>\n
A null value is represented by:\u00a0 -0-<\/p>\n
<\/p>\n
<\/span>Nothing<\/span><\/h2>\n“Nothing” is the opposite of “something”.<\/p>\n
If you have no car<\/em><\/span>, your car is equal to nothing.\u00a0 If you have no puppy<\/em><\/span>, your puppy is equal to nothing.<\/p>\nIn programming, “nothing” is used to de-reference a pointer, and release the memory used by the memory structure it had been using.<\/p>\n
<\/p>\n
On a side note, if you have no car, and no puppy, you must be really sad!<\/em><\/p>\n <\/p>\n
<\/p>\n
<\/span>Undefined<\/span><\/h2>\nBeyond “nothing”, which is the lack of “something”, undefined<\/em> means that the “something” in question can never exist.<\/p>\nFor example, the square root of -1 can’t exist — any number multiplied by itself yields a positive integer.\u00a0 In math, this is resolved using the “imaginary” number, i.<\/em><\/p>\nAnother example is dividing some number by zero.\u00a0 Division means taking a quantity of somethings<\/em> (the dividend) and putting them evenly in the number of specified buckets (the divisor) to determine how many somethings<\/em> go in each bucket (the quotient).\u00a0 As the divisor decreases (fewer buckets), the quotient gets larger.\u00a0 Fractional buckets yield quotients that are much larger than the original quantity of somethings.\u00a0 If you put 8 somethings in 4 buckets, 2 is the quotient.\u00a0 If you put the same 8 somethings in 1\/2 bucket, the answer is 16!\u00a0 As the size of the bucket approaches zero, the resulting answer approaches infinity!<\/p>\nFrom a procedural standpoint, putting x<\/em> amount of somethings<\/em> in to 0 buckets makes no sense.<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":"
There are many kinds of blank or empty values, that mean different things.<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,5],"tags":[],"class_list":["post-2021","post","type-post","status-publish","format-standard","hentry","category-science","category-the-light-side"],"_links":{"self":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/2021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/comments?post=2021"}],"version-history":[{"count":6,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/2021\/revisions"}],"predecessor-version":[{"id":2032,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/2021\/revisions\/2032"}],"wp:attachment":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/media?parent=2021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/categories?post=2021"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/tags?post=2021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}