Web Reference: Jun 3, 2025 · Learn all about Development Tools for your CIE A Level Computer Science exam. This revision note includes IDE features such as prettyprint and breakpoints. Most computer programs require a very large number of instructions to be carried out, so it is usual to only dry run small segments of code that the programmer suspects of harboring an error. Over the next few chapters you will, no doubt, find several issues with code that you are trying to run. In some cases it won't do exactly what you want it to, in other cases it may break half way through and in many cases when you first start programming it will completely refuse to run!
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