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Questions and Answers
A function in C++ is a block of code that cannot be reused multiple times in a program.
A function in C++ is a block of code that cannot be reused multiple times in a program.
False (B)
Every function in C++ can take only one parameter as input.
Every function in C++ can take only one parameter as input.
False (B)
The return type of a function in C++ is specified after its name.
The return type of a function in C++ is specified after its name.
False (B)
Functions should be defined after their use in a C++ program.
Functions should be defined after their use in a C++ program.
The main() function is optional in every C++ program.
The main() function is optional in every C++ program.
Functions in C++ do not help in structuring programs into segments of code to perform individual tasks.
Functions in C++ do not help in structuring programs into segments of code to perform individual tasks.
A function in C++ may or may not return a value depending on the return type specified.
A function in C++ may or may not return a value depending on the return type specified.
The function signature in C++ includes the function name only.
The function signature in C++ includes the function name only.
Parameters in a C++ function are mandatory and must always be included.
Parameters in a C++ function are mandatory and must always be included.
The function body in C++ contains statements that define the return type of the function.
The function body in C++ contains statements that define the return type of the function.
Function overloading in C++ allows multiple functions to have the same name and the same parameters.
Function overloading in C++ allows multiple functions to have the same name and the same parameters.
The return type of a C++ function is mandatory and must always be specified.
The return type of a C++ function is mandatory and must always be specified.
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Study Notes
Functions in C++
- A function is a block of code that performs a specific task and can be reused multiple times in a program.
- Functions break down large and complex programs into smaller and more manageable parts.
- Every function has a unique name and can take one or more parameters as input.
Characteristics of Functions
- A function can return a value back to the calling code using the "return" statement.
- The return type of a function is specified before its name.
Benefits of Functions
- Abstraction: Functions allow you to isolate a specific task into a separate block of code, making it easier to understand and manage the program.
- Reusability: Functions can be reused multiple times in a program, which reduces the amount of code duplication and makes the code easier to maintain.
- Modularity: Functions allow you to divide a program into smaller, more manageable parts, making it easier to write, test, and debug the code.
Functions Syntax
- A function consists of a return type, function name, parameters, and function body.
- The return type specifies the data type of the value the function returns.
- The function name and parameter list together constitute the function signature.
- Parameters are optional and can be referred to as actual parameters or arguments.
Function Overloading
- In C++, functions can be overloaded, meaning that multiple functions can have the same name but different parameters.
- This is useful when you need to perform a similar task but with different types of input.
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