Summary of Functions in C++ and Examples on Functions - Introduction to C++ Class 11

00:00:00 - 00:25:00

This video covers the basics of functions in C++. It explains what a function is and how to write one, as well as the advantages of using functions. It also discusses the difference between call by value and call by reference, and how they are used in C++.

• 00:00:00 In this video, the author introduces the concept of functions and provides an example of how to write a function. Next, he explains the syntax of writing a function, and provides a small example. Finally, he discusses the advantages of functions.
• 00:05:00 In this video, guest speaker demonstrates how to use functions in C++. The syntax for a function is as follows: void name( int x, int y, int s );. Parameters are passed in by reference. A function can return a value. If there is a failure while calling a function, the compiler will automatically return the value of the actual parameter to the main function.
• 00:10:00 In this video, the presenter explains the basics of functions in C++. He covers the definition of a function, the advantages of using functions, and the importance of declaring functions before using them. Finally, he discusses function prototypes.
• 00:15:00 The function calculates the area of a circle. The first thing it does is double the area of the circle. Then it calls the function "area" which takes in a radius and a variable to store the answer in. The function "area" returns a value to the main function, which saves that value in a variable called "a".
• 00:20:00 The "Functions in C++" video explains the basics of C++ function calls and how to write programs that use functions. The video covers the following topics: - What is a function, and what are its basic properties - How to call a function, and what is the return value of a function call - How to write a program that uses a function - The difference between call by value and call by reference, and how they are used in C++
• 00:25:00 In this video, the functions "digit" and "n I" are introduced. The "digit" function calculates the 10 + 2 = 12, and the "n I" function calculates the 0 one more time. Inside the "n I" loop, the value 0 is returned and the "n I" loop terminates. The "digit" function calculates the factorial of a number (in this case, 5) and the "n I" function calculates the factorial of a number (in this case, 5 * 4 * 3 * 2 * 1 = 120). Finally, the "digit" function returns the value 120 to the "main function" and the "n I" function returns the value 0 to the "main function."