PROGRAMMING WITH PHYTON

variables

variable is a name that refers to a value

message = ‘ good morning’

greeting= ‘good’

morning= ‘morning’

print(greeting+ morning)

Data type

data type is the kind of value that the data represents

(Text)String — str=A sequence of characters: “hello”

(Numeric)Integer — int=Whole numbers: 3 000

(Numeric)Float — float=Numbers with decimal point: 2.5

(Boolean) Boolean — bool= Logical value indicating True or False

(Sequence)List — list=Ordered sequence of objects: [10, “hello”, 200.3]

(Sequence)Tuple — tuple=Ordered immutable sequence of objects: (10, “hello”, 200.3)

(Mapping)Dictionary — dict=Unordered Key Value pairs: {“name”: “Maddie”, “age”: 18}

(Set)Set — set=Unordered collection of unique objects: {“apple”, “orange”, “durian”}

boolean

a boolean value is either true or false.

Comparison operators:

== (equal to)

!= (not equal to)

< (less than)

<= (less than or equal to)

> (greater than)

>= (greater than or equal to)

2. string

sequence of characters inside the quotation marks, e.g. ‘Hello, World!’

string operators

x in s

x not in s

s +t

s*n , n*s

s[i]

len(s)

3. string slicing

string [start: stop]

string [start: slice: stop]

input/output

Built-in Math Functions (in Python)

abs()

print(abs(101))

print(abs(-1,01))

round()

print(round(1.2345,3))

logical operators

control flow

1. One-way statement (if)
2. Two-way statement (if-else)
3. Multi-way statement (if-elif-else)

list

fruits = [‘apple’, ’banana’, ‘watermelon’]

numbers= [10, 8.5,9]

(print)fruits

(print)nunbers

accessing a list

fruits=[‘apple’, ’banana’, ’watermelon’]

print( clasmmates [0])

editing a list

fruits=[‘apple’, ’banana’, ’watermelon’]

fruits[0]=[‘orange’]

print(fruits)

combining a list

fruits=[‘apple’, ’banana’, ‘watermelon’]

neighbours=[lisa]

friends= classmates + neighbours

print(friends)

loops

1. for loops

fruits=[‘apple’, ’banana’]

for x in fruits:

print(x)

for x in range (2,10,2):

print(‘number:’, x)

2. while loops

score=1

while score<7

print(score)

score+=2

3. nested loops

adj=[‘fresh’, ’green’]

fruits=[‘apple’, ’banana’]

for x in adj:

for y in fruits:

print(x, y)

function

sum=0

for i in range(1,11):

sum+=1

print(‘sum between1 to 10:’, sum)