0 the use of a capital letter to begin the second word in a compound name or phrase, when it is not separated from the first word by a space: --
Style guidelines often distinguish between upper and lower camel case, typically specifying which variety should be used for specific kinds of entities: variables, record fields, methods, procedures, types, etc.
This machine lacked an underscore key, and the hyphen and space characters were not permitted in identifiers, leaving camel case as the only viable scheme for readable multiword names.
Wikipedia formerly used camel case linking as well, but switched to explicit link markup using square brackets and many other wiki sites have done the same.
Such patterns are identified by many users, ambiguously, as camel case.
However, some languages and programmers chose to avoid underscores, among other reasons to prevent confusing them with whitespace, and adopted camel case instead.
Some people and organizations use the term "camel case" only for lower camel case.
For clarity, this article calls the two alternatives upper camel case and lower camel case.
Camel case is also distinct from title case, which is traditionally used for book titles and headlines.
