Lesson Notes 3.5-3.7
Lesson Notes
What is a Boolean
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The defention of a Boolean is a denoting a system of algebraic notation used to represent logical propositions, especially in computing and electronics.
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A boolean expresions are either true or false.
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Testing if two numbers or variables are equal is a common example.
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For example: The sky is blue = True
Operators:
- AND: returns true if both of the values being compared are true and returns false if either of the values are false.
- OR: Returns true if either of the conditions are true. And returns false if both of the conditions are false.
- NOT: Returns true if the following condition is false. Returns false if it is true.
iswindy = True
result = not(iswindy)
print(result)
This uses the NOT operator and I think that it outputs the oposite of what is said. So if iswindy was False, then the output would be True, because it is the opposite
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Selection: A selection is a decision or a question. At some point in the program, the computer may need to ask a question because it has reached a point where there are one or more options available
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Algorithm: It is like a recipe. It is lines of codes that a computer follows to solve a problem
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Condition: They are basically a decision making statement in code.
Conditional Statement part 2: The code below is an example of a conditional statement
for i in range(2):
password = input("Please enter the password")
if password == "python" or password == "Python":
print("Welcome!!")
else:
print("This password is incorrect")