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16531471
2.2 programming V2
Beschreibung
Mindmap am 2.2 programming V2, erstellt von liam oneill am 24/01/2019.
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liam oneill
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liam oneill
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Zusammenfassung der Ressource
2.2 programming V2
variables, inputs, outputs and assignment
programs accept inputs from the user
processes it using constants and outputs to user
we can label various inputs and constants
this is known as assignment
information is stored in locations called 'identifiers'
it is called a 'variable' if it changes throughout the program
allow programs to have different purposes
but a 'constant' if it doesn't change
any information that a program makes use of is stored in RAM
RAM is divided in memory locations with long hexadecimal addresses
example of a computer processing an input:
input - people getting on bus
processing - bus moving along route
output - people getting off the bus for work
parameters
used to pass information between functions or procedures
variables : operators
Boolean - AND, OR, NOT
AND - two conditions must be true for statement to be true
OR - at least one of the values has to be correct
NOT - inverts the results
addition
subtraction
division
left
mid
right
modular division - how many times a number can go into another with a remainder
integer division ignores the remainder
SPLIT
join
iteration
while
for
counter
condition
boolean
iteration
break
nested iteration
stepping
Text files are used to store a variety of data: lists of names, logs of events, tables of data
String handling: to get the length of the string, to get a substring, the string will start with the 0th character, ascii conversion
Procedure: are sets of instructions stored under one name
Functions: are similar to procedures but always return a value to the main program.
SQL- Standard Query Language
SELECT
FROM
WHERE
SCRUD
search
create
read
update
delete
Arrays
index
elements/items
dimensions
split
iterating
zero-based
empty array
removing
overflow
adding/removing data
sub programs
parameter
function
procedure
argument
variable
program
data types
variable
integer
real
boolean
character and string
casting
data types
character sets
ASCII
unicode
file handling
EOF-end of line
EOL-end of line
new line character
file mode
commit
append
overwrite
tabulation
serialise
deserialise
delimeter
schema
SELECT
WHERE
LIKE
ORDER BY
ascending
descending
SQL
query
criteria
count
pattern
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