Computer Science

an expression that passes control and arguments (if any) to a subroutine

a subroutine that executes a block of code when called but does not return a value

Procedures

Structured programming

Functions

Global and local variables

Creating an XOR function

Programming project: subroutines I

Programming project: subroutines II

In this unit pupils will be introduced to structured programming. They will explore the differences between functions and procedures and use functions to return values in programs. They will be introduced to the concept of scope and how parameters can be used to reduce the need for global variables.

Programming: subroutines

used in a subroutine to allow values to be passed into it

a subroutine that does not return a value

a sequence of instructions to perform a specific task

{{}} are used in subroutines to allow values to be passed into them.

{{}} are the values held in the brackets of a subroutine call.

This code is an example of:

```def calculate(a, b):
    answer = a + b
    return answer

answer = calculate(5, 10)```

What keyword is used to define a subroutine in Python?

What is the term used for the name of a subroutine?

In this code:
```def num_walks(total_dogs, total_days):```
total_dogs and total_days are:

A {{}} chart is created to decide the hierarchy for a program.

A subroutine interface is made up of which items?

If a subroutine is defined, then it must be executed in the program.

Subroutines are always designed to perform multiple tasks.

Subroutines make programs easier to read and understand.

What code is missing from the program?

``` ___ multiply_two_numbers(number1, number2)
      answer = number1 * number2
      return answer

result = multiply_two_numbers(5,5)
print(result)```

Procedures

Lesson outcome