Nullish Coalescing is an operator used in programming to return the right-hand operand when the left-hand operand is either null or undefined. It is commonly utilized to set default values when potentially non-existent variables are involved, ensuring robust code execution without encountering unexpected null or undefined states.

Nullish Coalescing

Programming is the process of designing and building executable computer software to accomplish a specific task or solve a particular problem. It involves writing code in various programming languages, understanding algorithms, and applying logical thinking to create efficient and effective solutions.

Programming

Right-hand operand

Left-hand operand

In computer science and data management, 'null' is a special marker used to indicate the absence of a value or a non-existent reference. It is crucial for handling optional or missing data, but improper handling can lead to errors such as null pointer exceptions or data inaccuracies.

Null

In mathematics and logic, 'undefined' refers to expressions or operations that do not have a meaningful or interpretable result within a given context, often due to the lack of rules or definitions applicable to the situation. This concept highlights the limitations of formal systems and the necessity for precise definitions to ensure consistency and avoid ambiguity in problem-solving.

Undefined

Default values are pre-determined settings or parameters used by a system or function when no specific input is provided by the user, ensuring consistent behavior and reducing potential errors. They are crucial in programming, user interface design, and data management to streamline processes and enhance usability.

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