# Algorithms - Ray Chambers

LO: We’re learning to understand
how computers solve problems!
Let's say that you have a friend arriving at the airport, and
Here is an algorithm that you might give your friend for
The taxi algorithm:
Go to the taxi stand.
Get in a taxi.
Let's say that you have a friend arriving at the airport, and
Here is an algorithm that you might give your friend for
The taxi algorithm:
Go to the taxi stand.
Get in a taxi.
In groups / individual, see if you can come up with
other algorithms surrounding the scenario on the
previous slide.
Maybe it’s a bus from the terminal….
Sometimes it is easy to
build an algorithm when
you know how it works.
Have a look at this flow
chart below.
Can you explain
what is
happening and
why?
Here is some guidance on the symbols.
Splitting away from your group, pick one
of your algorithms and see if you can
build a flow chart which finishes.
You are required to use a video tutorial to create an algorithm
to check whether a student is old enough to buy a DVD or
game.
You will need to set up Table from a previous lesson before
you can use an algorithm to test it.
Video 8/9 shows students how to set up a table structure
and how to search it.
Once you have built this Algorithm, see if you
can build your own. TIP – Use a FLOW CHART
to plan it out before building it. Your teacher will
support any coding.
• An algorithm is a technical term for a recipe of
instructions which are:
•
•
•
Unambiguous – Recipe can be interpreted in one way.
Executable – Steps that the computer can actually carry
out.
Terminating – There needs to be an end to the
program.
• Use flow charts to help us plan out the
order in which we test or make decisions
in.