2.1.4 Thinking Logically

Question 1

Thinking Logically

Answer 1

Thinking Logically :
- Identify points where decisions must be taken - e.g. boolean conditions in sequence, selection or iteration
(e.g. Does … need to be shown/output)

• Program uses structured programming techniques including:
  Sequence: code executed line by line
  Selection: If statements that branch if a condition is met
  Iteration: Loops that repeat code while condition is met or set number of times
• Determine logical conditions that affect the outcome of a decision
  (e.g. most effective/convenient)

Question 2

Thinking Logically - Determine how decisions affect the flow through a program

Answer 2

Determine how decisions affect the flow through a program :
- Allows you to tackle programs effectively and determine which parts can be tackled simultaneously

Allows to develop Good algorithm which has :
- Clear precisely stated steps that produce correct output for inputs.
- Doesn’t allow invalid inputs.
- Must terminate eventually.
- Execute efficiently in as few steps as possible.