2.1.2

• Input/output

  
• Process

  
• Decision

  
• Sub-program

  
• Terminal

  
• Syntax error:

  • Getting the "grammar" or rules of the programming language wrong
  • Program will not run
• Logic error:

  • Produces incorrect / unexpected result / output
  • Program will runs - harder to spot
  • Types of logic error include:
  • Misplaced brackets in calculations
  • Iterations that loop incorrectly
  • Variables in wrong locations
• Identify one logic error in the program and correct it

  Line 2

  • for scoreCount = 0 to scores.length - 1

  OR

  Line 3

  • total += scores[scoreCount]

  
• Trace tables:

  Read the following pseudocode algorithm:

  01 start = 3

  02 do

  03 print(start)

  04 start = start - 1

  05 until start == -1

  06 print("Finished")

  Create a trace table for the algorithm

  A) 01

  B) 3

  C) 03

  D) 3

  E) 04

  F) 2

  G) 03

  H) 2

  I) 04

  J) 1

  K) 03

  L) 1

  M) 04

  N) 0

  O) 03

  P) 0

  Q) 04

  R) -1

  S) 06

  T) Finished