State two advantages to a software developer of using pre-written library routines when building an application.
Practise Edexcel GCSE Computer Science Subprograms with exam-style questions for GCSE Computer Science. 29 questions covering Built-in and user-devised subprograms, Functions versus procedures, and Global and local variables, matched to the Edexcel GCSE Computer Science (1CP2) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.