What will be logged by the following code?

What will be logged by the following code?

• A. Infinity
• B. NaN
• C. undefined
• D. ReferenceError

Answer: (B)

The code in question likely involves a mathematical operation or a variable assignment that results in an expression that is unable to yield a valid number. When an operation is performed that does not produce a definable number, the result is represented as "Not a Number" (NaN). For example, if the code performs an arithmetic operation such as dividing zero by zero, or if it involves trying to parse a non-numeric value as a number, JavaScript will return NaN. This indicates that the operation is invalid in terms of producing a numerical result. NaN is a specific value in JavaScript that is used to signify that a computation did not yield a real number. It is part of the IEEE floating-point standard, which JavaScript adheres to, and it helps in identifying errors in mathematical operations within the code. Essentially, any numeric operation that cannot produce a legitimate number ends with NaN, making it a common outcome in error handling and debugging scenarios. Identifying this behavior is essential for developers as it guides them in handling potential pitfalls in numerical computations effectively.

The code in question likely involves a mathematical operation or a variable assignment that results in an expression that is unable to yield a valid number. When an operation is performed that does not produce a definable number, the result is represented as "Not a Number" (NaN).

For example, if the code performs an arithmetic operation such as dividing zero by zero, or if it involves trying to parse a non-numeric value as a number, JavaScript will return NaN. This indicates that the operation is invalid in terms of producing a numerical result.

NaN is a specific value in JavaScript that is used to signify that a computation did not yield a real number. It is part of the IEEE floating-point standard, which JavaScript adheres to, and it helps in identifying errors in mathematical operations within the code. Essentially, any numeric operation that cannot produce a legitimate number ends with NaN, making it a common outcome in error handling and debugging scenarios.

Identifying this behavior is essential for developers as it guides them in handling potential pitfalls in numerical computations effectively.