If coding tutorials with math examples are the bane of your existence, keep reading. This series uses relatable examples like dogs and cats.
Background
I have experience with Python, but saw this 30 day challenge and decided it could only help.
So, I went to the challenge content, added the Telegram group, and started to read day 1.
Link: Day 1 content
Note: This challenge was built to be beginner friendly and help people learn Python.
Day 1 Topics
- installing python
- a simple script in IDLE
- addressing a syntax error
- math operators
- commenting
- installing VS Code
- starting with VS Code
- Data Types
- Exercises
link to day 1 material
Math Operators
Addition +
a = 3
b = 4
print(a + b) # 3 + 4 = 7
Subtraction -
a = 3
b = 4
print(a - b) # 3 - 4 = -1
Muliplication *
a = 3
b = 4
print(a * b) # 3 * 4 = 12
Division /
a = 3
b = 4
print(a / b) # 3 / 4 = .75
Exponent **
a = 3
b = 4
print(a ** b) # 3 ** 4 = 81
The ** is taking care of the exponent. If broken down it would look like 3 * 3 * 3 * 3
Modulo %
a = 10
b = 3
print(a % b) # modulo 10 % 3 = 1
Use this operator if you only want the remainder or whats left over after the division. In this example, we've done 10 / 3 which give us 3 groups of 3 and a remainder of 1.
This could be used dividing time. You can use the remainder for the next smaller unit of time.
Floor Division //
a = 10
b = 3
print(a // b) # floor division 10 // 3 = 3
This is important to use when you can only have whole things. For example you can't have .5 of a person or .2 of a plane. So, you would round down so you're only using whole people and whole planes.
Data Types
| Type | What | Example |
|---|---|---|
| Integer | whole numbers | 1 |
| Float | decimals | 1.1 |
| Boolean | True or False | True |
| String | characters in quotes | "4 bunch of ch4r4ct3r5!" |
| List | in order; may have different data types | ['Dog', 9, False, 3.142] |
| Dictionary | key:value pairs | {"name":"Wiley", "breed":"unknown", age:2, "is_nuetered":True} |
| Tuple | cannot be changed | ('Vicki', 1992, 'E5') |
| Set | may only have unique elements and may store different data types | My name is Vicki, but a set would be {'v', 'i', 'c', 'k'}
|
Series based on
Top comments (1)
I just saw your notes. You are amazing. Keep going! Day 3 has been release:github.com/Asabeneh/30-Days-Of-Python