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Class Schedule

Week 1: Integers

Week 2: If Statements

Week 3: Strings and Lists

Week 4: Loops

Week 5: Functions and Modules

Week 6: Calculator Project

Week 7: Review

Week 8: Final!

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What is Python?

Python is one of many programming languages that is used to interact with computers

Programming languages are used to create programs

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First Python Program

In your code editor, write this line of code

>>>

print(“Hello World!”)

This will output, “Hello World!” to the console

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Syntax

In programming, we have a term called syntax

Syntax is the grammar for programming languages

Different languages have different syntax.

Ex. Python has differing syntax than Java

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Syntax Examples

Python Java

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Variables

Variables are like jars you can use to store information
Each variable will have a unique name, and can be of four main data types
These data types are:

Integers (Whole number)
Strings (Words or Text)
Float (Decimal numbers)
Lists (lists of data)

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Variables

There are rules to what names you can give to variables.

Cannot start with number
Can only have alphanumeric characters (a-z, 0-9)
Variable names are case sensitive (ex. Name and NAME are two different variables.

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Variable Syntax

Here is how you define a variable:

>>>

myvar = 9

print(myvar)

This will output the number 9

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Data Types

Here are what the different data types look like:

Integer: A whole number

Ex. 1 and 10 are integers

Float: A decimal number

Ex. 1.8 and 9.0 are floats

String: Words or Text

Ex. “Hello” and “9” are strings

Note: Strings MUST have quotation marks

List: A list of numerous data types

Ex. [1, “hi”, 3, 9.0]

Java Note: Data types do not have to be explicitly declared in Python

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Arithmetic Operators

In Python, we have symbols for different math operations

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Booleans

This is another data type in Python
Unlike other data types, Booleans can only equal:

True
False

They can come as a result of comparison operators

Ex. print(5 > 9) will output, False
Ex. print(2 < 5) will output True

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Comparison Operators

Here are comparison operators in Python. They will always result in a boolean

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Arithmetic Operators

Here are shortcuts you can use for performing operations on variables

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Arithmetic Operators

Let’s use arithmetic operators with variables

>>>

myvar = 8 + 7

print(myvar)

This will output the number 15

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Arithmetic Operators

You can add variables as well

>>>

myvar1 = 12

myvar2 = 4

print(myvar1 + myvar2)

This will output 16

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Your Turn!

Solve this problem:

Create 3 variables containing integers, with any name that you pick. Then multiply the 3 of them together and print.

Hint: * is the symbol for multiplication

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Your Turn!

Solve this problem:

Create 2 Variables and compare the two using the == comparison operator. Save this to a variable and print your variable

3 variables total

2 are going to be integers

1 variable will be equal to the comparison of the two variables

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Questions?

Email:

codingpower101@gmail.com

Website: codingpower.org

Discord: https://discord.gg/TDFMVxdVqQ

Help Session: 3:30 to 4:30 PM Sundays!