• Ian Chivers
  • Jane Sleightholme


The role of functions in a programming language and in the problem-solving process is considerable and includes: Allowing us to refer to an action using a meaningful name, e.g., sine(x) a very concrete use of abstraction. Providing a mechanism that allows us to break a problem down into parts, giving us the opportunity to structure our problem solution. Providing us with the ability to concentrate on one part of a problem at a time and ignore the others. Allowing us to avoid the replication of the same or very similar sections of code when solving the same or a similar subproblem which has the secondary effect of reducing the memory requirements of the final program. Allowing us to build up a library of functions or modules for solving particular subproblems, both saving considerable development time and increasing our effectiveness and productivity.


Main Program Internal Function Intrinsic Function Function Header Predefined Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag London Limited 2012

Authors and Affiliations

  • Ian Chivers
    • 1
  • Jane Sleightholme
    • 2
  1. 1.Rhymney ConsultingLondonUK
  2. 2.FortranplusLondonUK

Personalised recommendations