Algorithms are one of the four cornerstones of Computer Science. An algorithm is a plan, a set of step-by-step instructions to solve a problem. If you can tie shoelaces, make a cup of tea, get dres...

Selection is a decision or question. At some point, a program may need to ask a question because it has reached a step where one or more options are available. Depending on the answer given, the pr...

You can use variables to store numbers. pocket_money = 20 The variable ‘pocket_money’ is used to store how much pocket money you have. Right now you have £20. As well as using fixed numbers in ...

A string is a variable that holds a sequence of one or more alphanumeric characters. It is usually possible to manipulate a string to provide information or to alter the contents of a string. The e...

A well-formatted spreadsheet is easy to read. Spreadsheet programs have plenty of formatting features. Adjusting column width and row height To adjust a column’s width or a row’s height, move you...

Images also need to be converted into binary in order for a computer to process them so that they can be seen on our screen. Digital images are made up of pixels. Each pixel in an image is made up ...

Binary data can represent numbers, graphics, sound and characters. It is then organised and manipulated differently. Data can also be stored in arrays, records or external files and go through vali...

Charts and graphs provide a visual representation of data, which can often be easier to understand. To make a chart, use the chart wizard or the gallery, then follow the onscreen instructions. Th...

There are many different features available within spreadsheet applications. Six of the most common, and most important, are listed below: Conditional formatting You can apply formats to individu...

By the end of this lesson, you will be able to: Understand what is meant by the terms software and hardware Recognise different types of software and hardware Iden...