Functions are like a programming languages power tools. They carry out clever calculations to produce useful results saving the programmer the time and effort of DIY!
There are many functions and only 3 are introduced:
the length of a text value (how many characters)
the rounded value of a real number (decimal fraction)
a random number value

The projects in this section will show you how to use the functions to increase the processing ability of your programs.
It is possible for a programmer to make their own customised functions but that is not covered in this course.
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