CS2 Conditionals
Presentation
•
Computers
•
9th - 12th Grade
•
Practice Problem
•
Easy
Maria Cruz Farooqi
Used 2+ times
FREE Resource
3 Slides • 7 Questions
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This image is an example of a concept in programming called
. More specifically, selection allows our computers to
, just like the image might help us make a decision on
– if it’s hot outside, eat
!
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Conditional expressions are how we represent
in our programs. More specifically, an expression occurs when values are combined using
. When you need to compare two values, you need to use a comparison operator. You can think of this like asking your computer a
question. Except our computer uses True to represent “yes” and False to represent “no.” We say the
when our computer answers the question.
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If statements like this are called
because they
of a program. You can see this more clearly if we map out our program with a
. Just like “while loops,” the condition of an “if statement” is constructed from
, like count < 3. The shapes in the flowchart represent different types of actions. For example, the diamond shape represents a conditional statement
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Let’s see how we can translate our flowchart into Python.
Notice the
Notice the
in front of the
line of code? This line has been indented because it is in the
. All code in the body of the if statement should be
.
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Translate the following flowchart into a Python program.
We should use the variable that we use to store the name of the nearest enemy, like ‘
We should ask if the nearest enemy is “
Statements that tell the hero to
We should use the variable that we use to store the name of the nearest enemy, like ‘
’.
We should ask if the nearest enemy is “
.” So ‘enemy == “skeleton”’.
Statements that tell the hero to
‘Attack the skeleton’ should be in the
.
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= hero.findNearestEnemy ( )
if (enemy
"skeleton")
hero.
( "Attack the skeleton!")
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