coding

integer input

variable = int(input("Enter number: "))

float input

variable = float(input("Enter number: "))

output/display/print

print(variable)

print message

print("Message")

variable example

score = 0
name = "Ali"
height = 1.75

convert to string

str(value)

convert to integer

int(value)

convert to float

float(value)

addition

total = total + number

subtraction

score = score - 1

multiplication

answer = num1 * num2

division

average = total / amount

quotient/integer division

result = 10 // 3

modulus/remainder

result = 10 % 3

powers/exponents

result = 2 ** 3

concatenation/joining strings

fullName = firstName + " " + lastName

basic if statement

if condition:
    print("True")

if else statement

if condition:
    print("Yes")
else:
    print("No")

if elif else statement

if condition1:
    print("Option 1")

elif condition2:
    print("Option 2")

else:
    print("Other")

equal to comparison

==

not equal comparison

!=

greater than comparison

>

less than comparison

<

greater than or equal comparison

>=

less than or equal comparison

<=

logical and

if age >= 18 and age <= 65:

logical or

if answer == "Y" or answer == "y":

for loop fixed repetitions

for i in range(5):
    print(i)

for loop through list

for item in items:
    print(item)

while loop

while condition:
    print("Running")

validation/password while loop

password = ""

while password != "computer":
    password = input("Enter password: ")

total algorithm

total = 0

for i in range(amount):
    number = int(input())

    total = total + number

average algorithm

average = total / amount

counting algorithm

count = 0

if condition:
    count = count + 1

largest value algorithm

largest = 0

if number > largest:
    largest = number

smallest value algorithm

smallest = number

if number < smallest:
    smallest = number

validation loop

age = int(input())

while age < 0 or age > 120:
    age = int(input("Enter again: "))

string length

len(word)

string slicing

word[start:end]

string slicing example

word[0:3]

create list/array

names = ["Ali", "Bob", "Sam"]

access item in list

print(names[0])

append/add item to list

names.append("John")

linear search algorithm

found = False

for item in items:

    if item == target:
        found = True

if found:
    print("Found")

else:
    print("Not found")

function template

def functionName(parameter):

    return value

function example

def triple(number):
    return number * 3

procedure template

def procedureName(parameter):

    print(parameter)

global variable

global score

open file for reading

file = open("file.txt", "r")

read one line from file

line = file.readline()

read entire file line by line

for line in file:
    print(line.strip())

close file

file.close()

open file for writing

file = open("file.txt", "w")

write to file

file.write("Hello\n")

nested if statement

if condition1:

    if condition2:
        print("Yes")

nested loops

for i in range(3):

    for j in range(3):
        print(i, j)

import random module

import random

random integer

random.randint(1, 10)

boolean false

found = False

boolean true

found = True