10C Arrays

​Do Now

​ 1. Log in

2. go to paper 1 programming

3. go to arrays 2

4. complete Do Now

​Do Now answers

​Big Question:

How can arrays be used to store and manipulate data?

• ​How are elements stored and accessed in a one-dimensional array?

• What are the benefits of using arrays for storing multiple elements?

• How are two-dimensional arrays structured and utilized?

​Key words: array, element, index, One-dimensional array, Multi-dimensional array

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

​0

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5

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

​0

1

2

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4

5

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

"Eva"

​0

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​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

"Eva"

​0

1

2

3

4

5

6

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

"Eva"

​0

1

2

3

4

5

6

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Deniz",

"Donny"

"Eva"

​0

1

2

3

4

5

6

​Making a 1D list

​"Alexandra"

"Amir",

"Ana",

"Daria",

"Donny"

"Eva"

​0

1

2

3

4

5

​Knowledge organiser

Questions ahead...

Multiple Choice

What term is used to describe an individual position of an element in an array?

• Index

• Pointer

• Variable

• List

Multiple Choice

friends = ["Bob", "Sally", "Jane"]

print(friends[?])

I want to add “Tim” to the list, what do I do?

• Append.friends(pop[“Tim’])

• append.friends(“Tim”)

• friends.append(“Tim”)

Multiple Choice

The following array is created in a program: " DIREWOLVES = ["Nymeria","Shaggy Dog","Ghost","Lady","Grey Wind","Summer"]

What is the item stored in DIREWOLVES [2] ?

• "Shaggy Dog"

• "Ghost"

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

1

2

​0

​1

​2

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

1

2

​0

​1

​2

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

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​0

​1

​2

array = [ [x, x, x] ,
[x, x, x] ,
[x, x, x] ]

Turn and talk

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

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Turn and talk

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

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​15

​Making a 2D list

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

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​1

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​30

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​Fanta	​10	​11	​12

​Making a 2D list

​0

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

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​1

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​Fanta	​10	​11	​12

​Making a 2D list

​0

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

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​Fanta	​10	​11	​12

​Making a 2D list

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Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

​1

​2

​3

​	​	​	​
​Fanta	​10	​11	​12

​Making a 2D list

​0

1

2

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

​1

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​3

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	​18	​17
​Irn-Bru	​19	​24	​30

​0

1

2

​0

​1

​2

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	20	​17
​Irn-Bru	​19	​24	​30

​0

1

2

​0

​1

​2

​Making a 2D list

​	​May	​June	​July
Coca-cola	​25	​20	​15
​Pepsi	​21	20	​17
​Irn-Bru	​19	​24	​30

​0

1

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​0

​1

​2

Questions ahead...

Multiple Choice

A program contains a 2D array ("CUSTOMER") storing customer numbers, first names and surnames

What data is held in stored in CUSTOMER [0] [2]?

• 1004

• Smith

• Amrit

• 1003

Multiple Choice

A program contains a 2D array ("CUSTOMER") storing customer numbers, first names and surnames

Where in the array is the data item "Kahn" stored?

• (2,3)

• (4,1)

• (2,2)

• (3,3)

Multiple Choice

A program contains a 2D array ("CUSTOMER") storing customer numbers, first names and surnames

What data is held in stored in CUSTOMER (2,0)?

• Amrit

• Kahn

• Taylor

• 1003

​Go to class notebook

Complete Activity 1