Functions and procedures

Question 1

Procedure

Answer 1

A procedure is a piece of code that you can run whenever you want

Question 2

Function

Answer 2

A function is just like a procedure but one that sends an answer back

Question 3

Subroutine

Answer 3

A seperate block of code that can be re=used

Question 4

call

Answer 4

A line of code that runs a subroutine

Question 5

Parameter

Answer 5

A value that a subroutin expects to be given when called

Question 6

Why use subroutine?

Answer 6

They are useful to break up large programs into self-contained chunks

Each subroutine can be tested seperatley to make sure it works correctly

Many programmers can work on large program at the sae time, cutting development time

some subroutines can be re-used in other programs

Question 7

2 key differences between procedures and functions

Answer 7

A function uses parameters to transfer data from the main program into the functiom
A function returns a value into the main program

Question 8

Subroutines benefits

Answer 8

Make programs easier to read

• They reduce the duplication of code
• complex problems are broken down into smaller chunks