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Return values are the outputs that a function provides after execution, allowing the function to communicate results back to the caller. They are essential for modular programming, enabling functions to be reused and composed into larger, more complex operations by passing results between them.
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Variable declaration is a fundamental programming construct that involves specifying a variable's name and data type, thereby reserving memory space for it. It is essential for defining the scope and lifetime of a variable, which determines where and how it can be accessed within a program.
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Scope refers to the boundaries or extent of a subject, project, or discussion, defining what is included and excluded. Understanding scope is crucial for effective planning, execution, and evaluation, as it helps manage expectations and resources efficiently.
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JavaScript objects are collections of key-value pairs, where keys are strings (or Symbols) and values can be any data type, including other objects. They are foundational to JavaScript's ability to create complex data structures and are used extensively for organizing and manipulating data in web applications.
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Type coercion is the automatic or implicit conversion of values from one data type to another, such as converting a string to a number in programming languages. It is a common feature in languages like JavaScript, where it can lead to unexpected results if not properly understood and managed by the developer.
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Error handling is a crucial aspect of software development that involves anticipating, detecting, and resolving errors or exceptions that occur during a program's execution. Effective Error handling improves program stability and user experience by ensuring that errors are managed gracefully and do not lead to application crashes or data corruption.
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