CAMBRIDGE IGCSE Topic 8.1 Using nested statements Also in this topic... CAMBRIDGE IGCSE Topic 8.1 Variables and constants CAMBRIDGE IGCSE Topic 8.1 The use of the three basic programming constructs CAMBRIDGE IGCSE Topic 8.1 The common Boolean operators CAMBRIDGE IGCSE Topic 8.1 Local and global variables CAMBRIDGE IGCSE Topic 8.1 Library routines