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What is a function in JavaScript?
- a)A JavaScript variable
- b)A reusable block of code that performs a specific task
- c)A JavaScript keyword used for loops
- d)A data type in JavaScript
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
What is a function in JavaScript?a)A JavaScript variableb)A reusable b...
A function in JavaScript is a reusable block of code that performs a specific task when called.
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What is a function in JavaScript?a)A JavaScript variableb)A reusable b...
Function in JavaScript:
Functions in JavaScript are reusable blocks of code that perform a specific task. They are fundamental building blocks in JavaScript programming and are used to encapsulate a set of instructions that can be called and executed multiple times throughout the code.
Key Points:
- Reusability: Functions allow you to define a set of actions that can be executed multiple times without having to rewrite the code each time.
- Encapsulation: Functions encapsulate a specific set of tasks, making the code more organized and easier to manage.
- Parameters: Functions can accept input parameters, allowing you to customize their behavior based on the values passed to them.
- Return Value: Functions can also return a value after performing their tasks, which can be used in other parts of the code.
- Function Declaration: Functions in JavaScript can be declared using the `function` keyword followed by a name and a set of parentheses containing optional parameters.
- Function Call: To execute a function, you simply need to call its name followed by parentheses, optionally passing any required parameters.
- Anonymous Functions: JavaScript also supports anonymous functions, which are functions without a name and can be assigned to variables or used as arguments to other functions.
Overall, functions play a crucial role in JavaScript development by promoting code reusability, maintainability, and modularity.
Functions in JavaScript are reusable blocks of code that perform a specific task. They are fundamental building blocks in JavaScript programming and are used to encapsulate a set of instructions that can be called and executed multiple times throughout the code.
Key Points:
- Reusability: Functions allow you to define a set of actions that can be executed multiple times without having to rewrite the code each time.
- Encapsulation: Functions encapsulate a specific set of tasks, making the code more organized and easier to manage.
- Parameters: Functions can accept input parameters, allowing you to customize their behavior based on the values passed to them.
- Return Value: Functions can also return a value after performing their tasks, which can be used in other parts of the code.
- Function Declaration: Functions in JavaScript can be declared using the `function` keyword followed by a name and a set of parentheses containing optional parameters.
- Function Call: To execute a function, you simply need to call its name followed by parentheses, optionally passing any required parameters.
- Anonymous Functions: JavaScript also supports anonymous functions, which are functions without a name and can be assigned to variables or used as arguments to other functions.
Overall, functions play a crucial role in JavaScript development by promoting code reusability, maintainability, and modularity.
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What is a function in JavaScript?a)A JavaScript variableb)A reusable block of code that performs a specific taskc)A JavaScript keyword used for loopsd)A data type in JavaScriptCorrect answer is option 'B'. Can you explain this answer?
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