What is an undefined value?

Undefined value usually occurs when an error in the computer software program code occurs. The variable that the program has been instructed to search is usually not valid or has no value that corresponds to what the code is looking for. For example, one part of the software application code can define a variable as a letter that does not correspond to the command function that guides the program to search for. When the program determines that it has an undefined value, it usually returns an error message. Display programmers will usually be able to determine how to fix an undefined value from the language contained in an error message or protocol.

The pointer is also considered an undefined value. When calculating, this corresponds to the absence of a value or object. It is something that the program cannot do with a valid object, and the attempt will often result in a mistake that will end the program. Lack of a valid object or value does not necessarily mean that the variable does not exist but that the program is unable to balance itwhat that makes sense.

programming errors that create an undefined value can define a variable, such as "name" as the equivalent of semicolon. When a feature looking for a "name" attempts to match Semicolon as a defined value, she realizes that Semicolon is not a name. As for the program, it is not valid and the function cannot continue.

Variables

can be checked to see if they contain undefined values. One way to test it is to compare a variable against the value of "undefined" or "null". Most programmers will be able to perform these tests. Other software programs are written in different programming languages, process and wording may vary.

Software programmers can also change the program coding and correct any errors regarding undefined values. They would simply have to make sure that the way in which the variables are defined is the same as, what the function is looking for. Sometimes tests or error messages will direct them in the right direction, or may have to thoroughly perform a line according to line examination of the code.