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Questions and Answers
What is a function in C programming?
What is a function in C programming?
- A variable that holds a specific value
- A section of code that can only be called from within the main function
- A named, independent section of C code that performs a specific task (correct)
- An identifier used to name different parts of the program
What does it mean to call a function in C programming?
What does it mean to call a function in C programming?
- Executing the statements contained in the function by using its identifier (correct)
- Creating a new function based on the existing one
- Copying the function's code to the main function
- Renaming the function for clarity
What does it mean for a function to be independent in C programming?
What does it mean for a function to be independent in C programming?
- A function can only be used once in a program
- A function can modify any variable in the program
- A function can access any variable in the program
- A function can perform its task without interference from or interfering with other parts of the program (correct)
What is the scope of function variables in C programming?
What is the scope of function variables in C programming?
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What is the purpose of a recursive function in C programming?
What is the purpose of a recursive function in C programming?
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Study Notes
Functions in C Programming
- Functions are reusable blocks of code that perform specific tasks, improving modularity and organization.
- They can return values to the calling code and can take parameters for input.
Calling a Function
- Calling a function involves executing the block of code defined by the function name followed by parentheses containing any required arguments.
- The control of the program transfers to the function, executes its content, and then returns control to the calling point.
Independent Functions
- An independent function can operate without relying on data from other functions or global variables.
- Independence promotes code stability and reusability, as functions can be tested and reused in different contexts without side effects.
Scope of Function Variables
- Variables declared within a function are local and exist only during the function's execution, known as local scope.
- Once the function terminates, local variables are destroyed, thus preventing them from being accessed outside that function.
Purpose of Recursive Functions
- Recursive functions call themselves to solve problems by breaking them down into smaller, more manageable pieces.
- They are used for tasks such as navigating tree structures or performing calculations like factorials, provided there is a base case to terminate the recursion.
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