undefined (2024)

FAQs

What does it mean when answer is undefined? ›

Broadly speaking, undefined means there is no possible value (or there are infinite possible values), while indeterminate means there is no value given the current information.

A rational expression is undefined when the denominator is equal to zero. To find the values that make a rational expression undefined, set the denominator equal to zero and solve the resulting equation. Example: 0 7 2 3 x x − Is undefined because the zero is in the denominator.

If something is undefined in mathematics, that just means that there's no object/operation in the system we're working in that has a given property. If an equation or system of equations has no solution, that means there's no object in the relevant system that satisfies the equation(s).

No solution, DNE (does not exist). This is when a false statement appears, like 4=7 . Many solutions, also called infinitely many solutions or All Real Numbers. This is when a true statement appears, like x+3=x+3 x + 3 = x + 3 .

'Undefined' means there is no answer to the expression at that point. Think of it as the value where you end with more question marks at the end.

adjective. without fixed limits; indefinite in form, extent, or application: undefined authority; undefined feelings of sadness. not given meaning or significance, as by a definition; not defined or explained: an undefined term.

For example: In various branches of mathematics, certain concepts are introduced as primitive notions (e.g., the terms "point", "line" and "plane" in geometry). As these terms are not defined in terms of other concepts, they may be referred to as "undefined terms".

Division by Zero

For example, 2x5-x is undefined when x = 5, because the denominator then becomes 0.

But just where the threat came from remains undefined. They are undefined, so you've no idea what to do. But at work, with undefined boundaries and relationships, it can cause problems. And in the middle, a great undefined mass he felt free to ignore.

In algebra, an undefined expression means a finite value does not exist, and an undefined limit is similarly defined. A limit is undefined if there is not a finite value that can be found for the limit. There are many reasons why undefined limits might exist.

What is the meaning of undefined terms? ›

Undefined terms are those terms that don't require a formal definition. The four terms are point, line, plane, and set. A point is quite simply, a dot. Points are labeled with one capital letter. A line is an infinitely long straight mark or band.

This is because undefined in JavaScript is considered a falsy value. In the example above, x is declared but not initialized, so it has a value of undefined . Even though x has no value, the condition if (x) evaluates to false , because undefined is a falsy value.

Undefined is used to indicate that a variable has not been assigned a value. It is not a valid value, and we cannot perform arithmetic operations with it. Zero is used to represent the absence of a value in a numerical context. It is a valid value, and we can perform arithmetic operations with it.

Sometimes a limit of a function does not exist, which is denoted by "DNE ."A two-sided limit does not exist if the value for f(x) approaches both a positive and negative infinity from either side of the value c. As well, if the value for f(x) approaches zero as x approaches c, then the limit does not exist.

In mathematics, the term undefined is often used to refer to an expression which is not assigned an interpretation or a value (such as an indeterminate form, which has the possibility of assuming different values).

A variable that has not been assigned a value is of type undefined . A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns undefined if a value was not returned .

Null in JavaScript means an empty value and is also a primitive type in JavaScript. The variable which has been assigned as null contains no value. Undefined, on the other hand, means the variable has been declared, but its value has not been assigned.

Yes, there is a difference between “does not exist” and “undefined”, but it can be a bit abstract. One way to think about it is that: “does not exist” means the object is impossible, whereas “undefined” means there are multiple possible objects that are equally viable.