SLR 09 – Advanced programming concepts 53. AQA GCSE (8525) SLR9 – 3.2 Data structures & arrays 54. AQA GCSE (8525) SLR9 – 3.2 Records 55. AQA GCSE (8525) SLR9 – 3.2 String manipulation 56. AQA GCSE (8525) SLR9 – 3.2 Random number generation 57. AQA GCSE (8525) SLR9 – 3.2 How to use subroutines 58. AQA GCSE (8525) SLR9 – 3.2 Local variables 59. AQA GCSE (8525) SLR9 – 3.2 Structured programming