Paper 2 Comp revision

Paper 2 Comp revision

1. Subprograms

   • Functions
     • Always return a value
     • When called, it must be assigned to a variable
     • Must take a parameter
   • Procedures
     • Do not have to take parameters
     • Do not return a value
   • Helps with decomposition

2. Software testing

   • Used to find defects in a program
   • Iterative
     • Testing during the development
   • Final
     • Testing after development, before releasing

3. DIV

   • Shown by //

4. MOD

   • Show by %