Welcome to the exciting world of computer science in 10th grade, where we delve into Unit #5: FUNCTIONS. In this unit, students will embark on a journey to understand the fundamental building blocks of programming known as functions. By the end of this module, you’ll not only grasp the concept and types of functions but also appreciate the advantages they bring to the world of coding. We’ll explore the key components of functions, including their signatures comprising the name, arguments, and return type. Furthermore, we’ll demystify essential terms related to functions, such as their definitions and practical applications. So, get ready to unlock the power of functions and elevate your coding skills to new heights.
10th Computer Unit 5 Long Questions Notes
10th Computer Unit 5 MCQ’s
10th Computer Unit 5 Exercise Solution Notes
- 10th Class Pak Study Textbook
- 9th and 10th Class General Science Textbook
- Chapter No. 9 Notes 10th Chemistry
- Biology 10th Class Past Papers
- English Past Papers of 10th Class
10th Computer Unit 5 Short Questions Notes
Question: What is the problem-solving approach known as?
Answer: The problem-solving approach is called “divide and conquer.”
Question: How does the divide and conquer approach make problem solving easier?
Answer: The divide and conquer approach involves breaking down a problem into smaller sub-problems, solving them individually, and then integrating their solutions. This allows for focused problem-solving on one sub-problem at a time, reducing complexity.
Question: What are the two types of functions in C programming?
Answer: The two types of functions in C programming are “Built-in Functions” and “User-Defined Functions.”
Question: Define Built-in Functions.
Answer: Built-in Functions are those provided by the C Standard Library. They perform common mathematical calculations, string operations, input/output operations, etc. Examples include printf and scanf.
Question: Define User-Defined Functions.
Answer: User-Defined Functions are functions created by programmers. They are written to perform specific tasks and can be reused in the program.
Question: Name some advantages of using functions.
Answer: Functions provide advantages such as reusability of code, separation of tasks, handling complexity, and improved readability of the program.
Question: What does the signature of a function define?
Answer: The signature of a function defines its inputs (parameters) and its output (return value). It includes the function’s name, return type, and data types of its parameters.
Question: Provide an example of a function signature.
Answer: An example function signature is:
int square(int);
Question: What does the return type in a function signature represent?
Answer: The return type in a function signature specifies the data type of the value that the function will return after its execution.
Question: Give an example of a function that takes multiple parameters.
Answer: An example function with multiple parameters is:
float perimeter(float, float);
Question: What is the purpose of a function that takes the radius of a circle as a float input and returns the area of the circle?
Answer: The purpose of this function is to calculate and return the area of a circle based on the given radius.
Question: How does the function “isVowel” work, and what does it return?
Answer: The function “isVowel” takes a character as input and returns 1 if the character is a vowel. Otherwise, it returns “Beyerson.”
Question: What components make up a function’s signature?
Answer: A function’s signature consists of its return type, function name, and the data types of its parameters.
Question: What does the body of a function contain?
Answer: The body of a function contains a set of statements that are executed when the function is called, performing the specified task.
Question: Provide an example of a function definition that doesn’t take any input and doesn’t return anything but displays a specific text.
Answer: “`c
void showPangram()
{
printf(“\nA quick brown fox jumps over the lazy dog.\n”);
}
Question: How is the return keyword used in a function, and what does it do?
Answer: The return keyword is used inside a function to return a value to the calling function. It marks the point at which the function’s execution concludes and passes control back to the calling function.
Question: Can a function return multiple values? Explain.
Answer: No, a function cannot return multiple values. Attempting to return multiple values, such as using return (4, 5);, will result in a compiler error.
Question: What happens when a function encounters a return statement?
Answer: When a function encounters a return statement, it returns the specified value (or none if void) to the calling function, and the control is transferred back to the calling function. Further statements in the function’s body are not executed after a return statement is executed.
Question: How is a function called, and what is the general structure for making a function call?
Answer: A function is called by using its name followed by parentheses containing the argument values (if any). The general structure for making a function call is function_name(value1, value2, ...);.
Question: Explain how program execution flows between the main() function and other functions.
Answer: Program execution starts from the main() function. When a function call is encountered within main(), control is transferred to the called function. After executing the statements in the called function, control returns to main() or the calling function. This process continues as functions are called and executed, forming a flow of control through the program.
Question: Define the following.
Functions
Answer: Functions are blocks of statements within a program that perform specific tasks. They enable the division of a program’s logic into manageable and reusable components. Functions can take input, process it, and produce output, contributing to modular and organized programming.
Built-in functions
Answer: Built-in functions, also known as library functions, are pre-existing functions provided by a programming language’s standard library. They perform common tasks such as mathematical operations, string manipulations, and input/output operations. Examples include printf() and scanf() in the C programming language.
Function Parameters
Answer: Function parameters are variables declared within a function’s parentheses during its definition. They act as placeholders to receive values passed to the function when it’s called. These values, known as arguments, are then used within the function’s body to perform computations or other operations.
Reusability
Answer: Reusability in programming refers to the ability to use a piece of code (like a function) multiple times within a program or in different programs. Functions promote reusability by allowing developers to write a specific set of operations once and use them wherever needed, reducing redundancy and enhancing maintainability.
Calling a function
Answer: Calling a function involves invoking the function within the code by using its name followed by parentheses containing the required arguments. When a function is called, the control of the program transfers to that function’s definition, executes the statements within it, and then returns to the calling point in the code.
Briefly answer the following questions.
What is the difference between arguments and parameters? Give an example.
Answer: Parameters are variables defined within a function’s declaration, and they act as placeholders for values to be passed into the function. Arguments are the actual values passed to the function when it’s called. For example, in the function declaration int square(int num), “num” is the parameter. When calling the function with square(5), “5” is the argument.
Enlist the parts of a function definition.
Answer: A function definition consists of several parts:
Return Type: Specifies the type of value the function will return.
Function Name: The name used to identify and call the function.
Parameters: Variables that receive values when the function is called.
Body: The set of statements executed when the function is invoked.
Is it necessary to use compatible data types in function definition and function call? Justify your answer with an example.
Answer: Yes, it’s necessary to use compatible data types. For instance, if a function is defined to accept an integer parameter, you should pass an integer as an argument when calling it. Mismatching types can lead to errors or unexpected behavior.
Describe the advantages of using functions.
Answer: Functions offer several advantages, including:
Reusability: Functions can be used multiple times, reducing code duplication.
Modularity: Dividing a program into functions makes it easier to manage and understand.
Separation of Tasks: Functions allow different tasks to be handled separately, enhancing maintainability.
Readability: Well-organized functions enhance the overall readability of code.
What do you know about the return keyword?
Answer: The “return” keyword is used in a function to send a value back to the calling code. It marks the end of the function’s execution and can provide a result to be used further. The return type specified in the function’s signature determines the type of value that can be returned.