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Variables: In this tutorial, a variable is a storage location paired with a unique identifier; i.e., a name. It is not be confused as an attribute that describes an idea, a person or an object (i.e., statistics). 

A special thanks

• To Alex Westenberg Westerberg and Elaine Smith for making possible to organise this workshop.
• To Becca Wilson, for producing the original content of this tutorial. Without the invaluable examples, this tutorial would not be as comprehensive.
• To Hasan Adel Jawal Khalil Al Radhi for going through the whole course and suggesting so many improvements. The course has benefited so much from it.  
• To Heather Parker, for  printing the course material each time the tutorial has been delivered. 

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