Teach 2.2.1 and 2.2.2

• Computing
• Upper Secondary (Key Stage 4)
• GCSE

Teach 2.2.1 and 2.2.2

Question the Answer

Can you write the question to these answers!!

Three types of programming construct

Question this Answer --> A value that can change, usually when the program is running

So what is this then --> An item of data that will not change during the program execution

Examples of constants

VAT rate - 20%

Pi - 3.14159265359

What maths operators do you know?

Maths operators

+  -  *  /

MOD

DIV

Exponential (to the power of)

MOD and DIV

DIV works out full divisions

10 DIV 3 = 3     (because 3 fits three times)

In python this looks like 10//3

MOD works out remainder after division

10 MOD 3 = 1 (because 1 left after all 3s accounted for)

In python this looks like 10%3

So what does that leave 10**2 to do in python?

Computers are stupid

They don't know what kind of data you are giving it.

It needs to know the format of that data to store it correctly.

These are called datatypes

Data types?

Data Types

Integer

Real

Boolean

Character/String

What would you use to store a first name

1. String
2. Real
3. Integer
4. Boolean

What would you use to store a phone number

1. String
2. Real
3. Integer
4. Boolean

What would you use to store a price of a product?

1. String
2. Real
3. Integer
4. Boolean

What would you use to store whether the customer qualifies for a discount?

1. String
2. Real
3. Integer
4. Boolean

What would you use to store how many children you have?

1. String
2. Real
3. Integer
4. Boolean

Casting

Turning one datatype into another one when coding

EG

x = input("how old are you?")

if int(x)>=18:

     print("Adult")