define variable

storage location in a computer program - value - store in memory location

what are primitive data types

data,, floats, whole number values

reference data type?

complex structures, aries, strings

define a variable

named storage location whose value can change while program is running, can be over ridden

define constants and examples

cannot be changed, numeric constants ()/ string constants(‘‘)

use UPPER_CASE

what are reversed words

should not be used - already have their own fixed meanings and should not be used as variable names, function names or identifiers

why cannot you use class as a variable name

it is already reserved word

why can you not use letter/us.ot

you cannot use the symbols

whats camel case

firrstword lowercase second word starts with a capital

what is papscal

both capitals for both parts of the name

what is Sniciss

with underscores

what is kebabcase

using a dash - make sure its not a minus

whats a neumonic

memory aid to know what your value is storing in memory

what are the operators

what are the types of data types

integers/ floats

what is the difference between int/float

+ve,-ve,0

exp, frcat, .

what does concatenate mean

put two strings together

how do you identify a data type

type ()

greetings = ‘hello’ + ‘danny’

print (type(greetings)))

output <class ‘str’>

define type conversion/ typecasting

changing one type of data into another string

int(), float (), str(), complex()

how do you show a type cast in code

print(float(111) + 11)

122.0

how do you type cast variabl data types

i = 59

f = float(i)

define slice

A slice gives from a string one character in the position of the index. E.g. S[i] means the ‘i’ is the position index of the string character

HOW DO YOU SHOW A SLICE

how doo you give the last letter of a string when ou slice

hwo do you convert between strings and integers

how do you get user input

name= input(‘what is your name’)
print( ‘welcome’, name, ‘!’)

how to ask for iinitials if names are already given

initials = name1[0] + ‘.’ + name2[0]

print (‘your initials are’, initials)

elevtor problem

what are the modern applications of programming language

• developed under heavy time constraints

• teams

• run time

• written by a lot of people

define code

seriese of sorted instruction

about python

• guido van rosso

• high skilled language

• portable since high skilled

  • free and open source

compiler porcess

source code → complier → oject code → execture → output

interpreter

source code → interpreter → output

what is a vim command mode

Vim can be used with your command line program to edit programs written in any programming language