Published on 2 Feb 2013
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To define a conditional task in terms of the condition and the task.
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Use if, if/else, nested if/else, chained if/else to define conditional tasks.
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Relational expressions.
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Boolean expressions.
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Context is often determined by:
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Each sub-task can be any kind of task.
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Objective
Express the condition.
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Describe the task.
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To describe a conditional task.
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How to recognize dial tone, etc
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You may need to consider things that are not explicitly mentioned, e.g.,
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Problem solving
Like a plan that is designed to handle several possibilities.
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Only one context is true at any time.
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When performing the task, you know which one is true.
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You don't know which one is true!
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You have to plan for both cases.
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When designing the algorithm.
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Conditional task
It's generally in the form of a statement that may come with a condition.
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We can include any sub-task as part of an if statement
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Indentation shows the extent of the subtasks in the then-clause.
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The if statement.
The else part is optional.
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The if-else statement is a special case of the if/else statement.
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The if/else statement
Conditional Tasks
January-31-13
9:56 AM
CMPT 113.3 Page 1