Evaluating process: Difference between revisions
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=== Example === | === Example === | ||
Imagine you are writing a simple computer program which must output | Imagine you are writing a simple computer program which must output the winner of a game. A winner is determined whichever score is higher. The input is two scores. The output must be only one of the scores below: | ||
# The first score is the winner | # The first score is the winner | ||
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winner = "There is a tie" | winner = "There is a tie" | ||
</syntaxhighlight> | </syntaxhighlight> | ||
If we were to evaluate this process, we would ask ourselves | |||
== Do you understand this? == | == Do you understand this? == | ||
Revision as of 12:21, 15 July 2017
You must evaluate if the sequence of activities (or instructions) will result in the required outcomes. This evaluation can be logical, arithmetic, or both.
A common scenario is evaluating the order of conditionals. You must become very good at tracing conditional expressions.
You should remember your order of operations:
In mathematics and computer programming, the order of operations (or operator precedence) is a collection of rules that reflect conventions about which procedures to perform first in order to evaluate a given mathematical expression.[2] The mathematical order of operation is: PEMDAS (
How to evaluate a process[edit]
Use a step-by-step process and trace the value of a variable or value. Ask yourself, at each step in the process, what is the current value or state of a variable. Let's look at some examples.
Example[edit]
Imagine you are writing a simple computer program which must output the winner of a game. A winner is determined whichever score is higher. The input is two scores. The output must be only one of the scores below:
- The first score is the winner
- The second score is the winner
- There is a tie
def whoIsTheWinner(score1, score2):
if(score1 > score2):
winner = "The first score is the winner"
elif(score2 > score1):
winner = "The second score is the winner"
else:
winner = "There is a tie"
If we were to evaluate this process, we would ask ourselves
Do you understand this?[edit]
Standards[edit]
- Evaluate whether the order in which activities are undertaken will result in the required outcome.