Subrat's Technical Blog: Charming Python: Day 1 of 30

Sunday, November 24, 2019

Charming Python: Day 1 of 30

30 Days of Python (3 Part Series)

1) Charming Python: Day 1 of 30 2) Charming Python: Day 2 of 30 3) Charming Python: Day 3 of 30

Background

I have experience with Python, but saw this 30 day challenge and decided it could only help.

30DaysOfPyton Challenge

Asabeneh ・ Nov 20 ・ 1 min read

#python #javascript #react

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

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'}`