Understanding Sub-Programs: Procedures and Functions

The video tutorial explains sub-programs, focusing on procedures and functions. It uses a dice game example to illustrate how functions return values and procedures do not. The advantages of sub-programs, such as easier debugging and reusability, are discussed. The video also covers how sub-programs are represented in flowcharts and introduces the OCR Exam Reference Language for exams.

What are the two main types of sub-programs discussed in the video?

• Classes and Objects

• Procedures and Functions

• Loops and Conditions

• Variables and Constants

What is the primary difference between a procedure and a function?

• Procedures are used for loops, functions for conditions

• Procedures return a value, functions do not

• Functions are used for loops, procedures for conditions

• Functions return a value, procedures do not

In the dice game example, what does the function 'roll a dice' return?

• A fixed number

• A random number from one to six

• A boolean value

• A string value

Why is it beneficial to use sub-programs in coding?

• They make the code longer

• They make the code slower

• They make the code harder to read

• They make the code easier to write and debug

What is one of the advantages of using libraries in programming?

• They allow for easy use across multiple programs

• They reduce the number of functions available

• They make the code less reusable

• They increase the complexity of the code

How are sub-programs represented in flowcharts?

• With a square

• With a triangle

• With a circle

• With a specific symbol indicating a jump to another flowchart

What is a key benefit of structuring code into sub-programs?

• It makes the code easier to read and debug

• It makes the code harder to debug

• It makes the code less modular

• It increases the number of errors

In the OCR Exam Reference Language, how does a function start?

• With the word 'procedure'

• With the word 'function'

• With the word 'start'

• With the word 'begin'

What does the procedure 'greeting' do in the OCR Exam Reference Language example?

• Calculates a number

• Executes a loop

• Prints a greeting message

• Returns a value

In the OCR Exam Reference Language, what is the correct way to call a function named 'triple' with the parameter 7?

• triple(7)

• function triple(7)

• execute triple(7)

• call triple(7)