| Table of Contents |
|---|
Basics
Comments
Comments start with a pound(#) sign.
| Code Block |
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# define a number
time_elapsed_s = 12.34 |
Variables
| Code Block |
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# define a number time_elapsed_s = 12.34 #define a string first_name = "John" #define a boolean - True/False is_online = True |
...
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course = "Course Name"
index = course.find("u")
print(index)
#or to get True/False if an substring exists using IN
found = "Name" in course
print (found) |
Arithmetic Operators
| Operator | Description | Example |
|---|---|---|
| + | plus | 10 + 3 = 13 |
| - | minus | 10 - 3 = 7 |
| * | multiply | 10 * 3 = 30 |
| / | divide - returns float | 10 / 3 = 3.333 |
| // | divide (whole number) | 10 // 3 = 3 |
| % | modulus - remainder of division | 10 % 3 = 1 |
| ** | exponent | 10 ** 3 = 1000 |
+=, *=, ... | Augmented Assignment Operators | x+=3 = x=x+3 |
Comparison Operators
| Operator | Description |
|---|---|
| > | Greater than |
>= | Greater than or equal |
| < | Less than |
| <= | Less than or equal |
| == | Equal |
| != | Not Equal |
Logical Operators
| Operator | Description | Example |
|---|---|---|
| and | logical and | price =20 print( price >10 and price < 30 ) |
| or | logical or | price =20 print( price >10 or price < 30 ) |
| not | price = 20 print (not price >10) |
If Statements
If statements use indentation instead of curly brackets in Java.
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temperature = 25
if temperature > 30:
print("It's a hot dat")
print("Drink plenty of water")
elif temperature > 25:
print("It's a nice day")
else:
print("It's a cold day")
print("Done") |
While Loops
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i=1
while i<=1_000:
print(i)
i=i+1 |
Notice in the above example we used an underscore to make reading the integer 1000 easier to read.
Cheat Sheet
References
| Reference | URL |
|---|---|
| Python for Beginners - Learn Python in 1 Hour | https://www.youtube.com/watch?v=kqtD5dpn9C8 |
Python Cheat sheet for hackers and developers | https://hakin9.org/python-cheat-sheet-for-hackers-and-developers/ |
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