Keywords

1. Array: A collection of similar data of a fixed length. E.g. myArray = ["Apple", "Banana", "Cherry"]

2. List: A collection of different data types of any size. E.g. myList = ["Apple", "B" , 3.142, ]

3. Data Structure: A storage that is used to store and organize data (such as Arrays)

4. One-dimentional Array: An array that holds a "row" of data

5. two-dimentional Array: An array that holds a "rows" and "columns" of data

https://www.w3schools.com/python/python_arrays.asp

Predict and Run

Look at the code for each question.

What do you think will be the output?

What is the actual output?

Investigate

1. Look at the code on the right.

2. Run it and see what it does.

3. Click on the pencil icon at the top to see the code again.

FIRST EXAMPLE:

1. Run the program and see what it does

2. If you were to print myArray, what would be the output?

3. What happens if you output row on line 8?

4. What happens if you added another name to the first row?

Extra Knowledge: https://www.tutorialspoint.com/python_data_structure/python_2darray.htm

Extend

Help:

print ( ) is used to output text

input( ) is used to get the user to type something

Variables store values that can change.

Name = Value here

To manipulate "Strings":

len( word ) returns how long it is

.upper() turns it to upper case

.lower() turns it to lower case

variable[x] returns the letter at position x

int( string) turns it to a string (if possible)

float (string) turns it to a float (if possible)

str (variable) turns it to a string " "

Boolean: a data type that can hold one of two values (true or false)

> Symbol: Greater than

< Symbol: Less than

== Symbol: Compares if both values are the same

!= Symbol: Not equal to

>= Symbol: Greater than or equal to

<= Symbol: Less than or equal to

Selection -

if (condition) :

(indent) program here....

Iteration -

for varName in range (start, end, increment):

(indent) program here....

while (condition) :

program here ....

Lists:

myList = [ "item1", "item2", "item3"]

print (myList)

print (myList[0]) #Outputs 1st item

myList.append("Item4") #Add new item

myList.remove("Item4") #Removes "item4"

myList[0] = "newItem" #Changes value in 0

twoDimensionalList = [ [row1Item], [row2Item]]