Understanding Functions in C

What is a function in C?

• A function in C is a type of variable.

• A function in C is a data structure.

• A function in C is a keyword used for loops.

• A function in C is a reusable block of code that performs a specific task.

How do you declare a function in C?

• return_type: function_name(parameter_name);

• function_name: return_type(parameter_type parameter_name);

• function_name(parameter_type parameter_name) return_type;

• return_type function_name(parameter_type parameter_name);

What is the purpose of the return type in a function?

• To determine the function's execution time.

• To specify the function's name.

• To define the type of value a function returns.

• To indicate the function's parameters.

Can a function in C return multiple values?

• No, a function in C can return multiple values using structures.

• Yes, a function in C can return multiple values using arrays.

• No, a function in C cannot return multiple values directly.

• Yes, a function in C can return multiple values using pointers.

What is the difference between a function declaration and a function definition?

• A function declaration can only be used in global scope; a function definition can only be used in local scope.

• A function declaration introduces a function's name and parameters; a function definition provides the function's implementation.

• A function declaration includes the function's body; a function definition does not.

• A function declaration is used to call a function; a function definition is used to create a variable.

What are function parameters in C?

• Function parameters are constants in C.

• Function parameters are return types of functions.

• Function parameters are used to define global variables.

• Function parameters in C are variables used to pass values into functions.

How do you call a function in C?

• myFunction(5, 10);

• myFunction: (5, 10);

• call myFunction(5, 10);

• myFunction[5, 10];

What is recursion in the context of functions?

• Recursion is a method of combining multiple functions into one.

• Recursion is a method where a function calls itself to solve smaller instances of the same problem.

• Recursion is a technique where a function uses loops to repeat actions.

• Recursion is when a function runs indefinitely without stopping.

What is the scope of a function variable?

• Available only after the function is called.

• Local to the function where it is defined.

• Only accessible within the entire module.

• Global to all functions in the program.

How can you pass an array to a function in C?

• You can pass an array by copying it to a new variable.

• You can only pass arrays by value in C.

• You can pass an array to a function in C by using a pointer to the first element of the array.

• You must use a struct to pass an array to a function.