#python syntax

Understanding Python Syntax: A Beginner's Guide

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For my memory (because my little fish brain may fail me): 

This is a string array: 

nephews = [ “Jesse”, “Leon”, “Neville”]

You would print Leon’s name by: nephews[1]

You can get total number of nephews by: len(nephews)

You could give them all a surname by: 

for i in range [3]

nephews [i] = nephews [i] + ‘Kitungulu’

print (nephews)

You could add a 4th nephew by: 

nephews.append (’Johnie Bravo’)

nephews.extend (’Johnie Bravo’)

extended_nephews = nephews + [’Johnie Bravo’]

nephews.insert (3, ‘Johnie Bravo’)

You can delete a nephew by: 

nephews.remove (’Leon’)

del nephews [1]

You can arrange the names in alphabetical order by: 

nephews.sort ()

This is a numerical array: 

squares = [0,1,4,9,16,25,36,49]

You can slice the array so that you get the first and second elements by:

squares[0:2] to get 0,1

squares[1:3] to get 1,4

squares[:4] to get 0,1,4, 9

squares[1:] to get 1,4,9,16,25,36,49

squares[:] to get 0,1,4,9,25,36,49

squares[-1] to get 49

Addition:

addition_var = 50 + 10 #60

Subtraction:

subtraction_var = 50 - 10 #40

Multiplication:

multiplication_var = 5 * 10 #50

Division:

division_var = 10 / 5 #2

Exponentiation:

exponentiation_var = 2 ** 3 #8

Modulo:

modulo_var = 5 % 2 #1

In the next image there’s a way for calculating the final cost of a meal in a restaurant. We print the total using the instruction:

print(”%.2f” % total)

Which prints the variable total, the entire integer part and just 2 decimal digits.

Numbers:

♦ Integers:

my_int = 5

♦ Floating point:

my_float = 1.28

Booleans:

my_bool1 = True

my_bool2 = False

Strings: