Connect to the Workshop http://bit.ly/dslpython
Basic structure is variable = value. Variables can be many things, numbers, letters, and lists.
EG. ratio between kilograms and pounds kg_to_lbs = 2.2
EG. list of x,y coordinates of a point origin = [0,0]
More complicated variable that has a value and a key
EG.
stocks = {
"IBM": "Internation Business Machines",
"GOOGL" : "Alphabet Inc",
"AAPL: "Apple Inc"
}
EG. print(stocks["GOOGL"])
displays Alphabet Inc
| Symbol | Operation |
|---|---|
* |
multiplication |
+ |
addition |
- |
subtraction |
% |
remainder |
/ |
division |
Allow us to repeat the same thing a few times
crayon_colours = ["red","blue","yellow"]
for crayon in crayon_colours:
print(crayon)
Allow us to compare to values
| Operator |
|---|
== |
>= |
<= |
< |
> |
!= |
Allow us to combine conditionals
| Operator |
|---|
and |
or |
not |
We can use predefined bits of code if they are turned int functions.
EG. len(some_variable) will print out how long the variable is. If a list, than how many items. If some text, how many characters.
Making our own, you follow this prototype
def function_name(parameter):
value = 0
# do some stuff
return value