Summary
Summary All of Paper 2 Computer Science GCSE OCR Notes
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GCSE OCR Computer Science, J277 Specification from 2020, all of the paper 2 notes
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2:1~ Alogorith ms Flowcharts and wiverpening algoritn nsseynca t nstnutsns ummen
Structwe diagremy Algontn m :fA
foUse to sse pro'o
A grapnitu sy Co e
Probm Fioucnart symots
aprto1em, nis ts bken line
Advantages process
• Progams to rite
•Pogs re less pe to misus ury erelpnen Su.o proce
ss
Myethanne (subutine)
proyrammer
Input l5uput
Exompe garaener questen (L2)
Turf iayng
de s.on
Clients
(selectn)
quaity seif Size
Gnten Scarching
Ent Ent
ent Ist
nt
quote dot times
frst Stort Stop
tr
nome
dat.
2-5 - Intcare Durelpment Lnnromen Trae Tabus
IDE abbrenatgn
Fear
execti rnnng it.
Uwinment lmt csd)
Editor (to
Ersr diagnatie
Run- Time
(eEE T) F*r my sns resing
Trans \ats
dtor, bet
ensne
ngming .
Enabwn pnw to
any logic e
Exampu
Tesrs
Tranlkori UsER INPUT
Gmr duaynostis:
WH I LE num< 500
num num 2
END wHILE
fer wes wod taa tanw
Additirat
wse wpats nmhr 4, at
Bne puints nec nients
be iwe?
Srop puse Prgr
num num 500 O0TPV 1
Synteu copwtisn
.Sng5 srs Iorecrs 4 TRUE
Stepps TaUE
TRUE
32 TRUE
Te for brucng
64 TRUE
7ext editor TRUE
mth nans 266 TRUE
512 FALSE
Hi9ni n Syntox eours 512
, efeen Languages (ong ufferenwn) a referenca angaye
ope rators Boolea opeato loops
Antnmetic
for io to
Enponet
Commentny
MO0 prnt ("Losp")
Mocul
nei
Duotient
ven umben
oXOUoe ( or i-2 t I Step2 pints tha
Erom 2 to i0
Const Const Pinti
norr ncwsi
(onstnts
n
net posit
Gicbed Voioles
exampe
Castung
re ("4.s2") wha
npnts
pytnm.
not c thuy Chec onkion
endwnie
Koops
Pythm for... to
in anyeC) cho
fori
FOR lOo
next..
Cnswes inpt ("New
anse)
(count
contme)
fur
.t untl CWS "Cocrec
x,y)
range(i,
next...
Selection
whie enie Swit cn day
Case St":
(conhhon (" Saturdan)
Pnne
contrMed)
D0wHILE nti ... Case "Sn
Selecein Pytnon
;S.. the
pnm "Sunay)
I-THEN-ELSE ce fcuult:
elsei.. hen "Weeag
eise
pnt
se endif
r Suence
CASE SELEC T
not Swit... Compute
Case Swostuig
mes c,Swostrng (3, 5) puter
Case Swbje
ben te cdefawt Subjet. let (4) Comp
tuns "nce*
X indee
Srrny nnaling Pytnon
Aength amuy
(x,i) eats
•Sunstniy colous L5
Subsrrungs
- tosa 5ty ray lements Cnoes
(i)
ngh ["Bue,
arry colours Arys can be decLand
Pythnsn "Gneen,eUo "Re ih
enotfu)
Ory 9cme boord Í8,81 Nates 20 amy wth 8
Python elemevts Cuney 0 to 7)
Deco
n
10 Cry colours L..J assignsenA
Nmi Gi
arrgspnçie
nams C37-
" vqlue to iLe
bunets
me 2D Simir
n-w,k
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Procese eg().. pocesr
funcri
functm
onaom l)
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