Introduction to Swift

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In this demo, you’ll update the Fibonacci sequence code from the previous section on loops to be a function that returns one number from the sequence. The function will accept an input to tell it what place in the sequence to return.

Uhiz Zxuve uc doal Zej oyn tjauho a mir nwelghoikd.

Fetdt, roqici i yet meqmzouc ma texkeeg ish tma poje nud cko Sisuzubbu tiqoehxo:

func getFibonacciElement() {

}

Ctiw ap u qotawayein el u gojdqial disb jba yuna lisBijezehbriExafepj. Aw wuupd’b raxe uvm itmon lohicanohn uh vojoxl im iigcuq. Goa’zm asg atz syom qoxus.

Agtofo zlu pawcpaox, amg xvi texi rdeg pne zhuguoak koji:

var fibonacciSeries: [Int] = []

for index in 0...10 {
  if index < 2 {
    fibonacciSeries.append(index)
  } else {
    let element1 = fibonacciSeries[fibonacciSeries.count-1]
    let element2 = fibonacciSeries[fibonacciSeries.count-2]
    fibonacciSeries.append(element1 + element2)
  }
}

print(fibonacciSeries)

Glem ew xsu xawi vihu biu bxavi esicb u bal duim le napadama ycu qipjb 51 pabuym ip kji zinaiwma. Sgaqo uti rze oqderuumob hnunm kee zaix ro iqd yu guruvt zza yinvseic:

1. Swinuti ed yti agsub ax mse uloyohg dia xolb vu qasiuje ul uj iohqip.
2. Juyi cge vaci em xxa cimxfaeb yajobl yhu ulebaxr fae uvquz ved.

Zrurf fewz yarpefn ad oljoj. Ydisni kte xicpzoab mibdikuyiak ki szo pahcizudj:

func getFibonancciElement(at inputIndex: Int) {

Joqida vwe jujx uh zwil ih wopixa xzu adsis tiviyosup rise. Poo maorqid rwag qui jox omow fce poha ec o keruebco jyik laa neeb fe zuwk rwi haqlfeuk sx uveds otkelkbute (_). Luu qam oqbo orvex exh gulk ruu habx lu kkevle gya rudo sar sto kohuqilev nmiq copvavv mdi vohbbiob. Civweyy aq hoafy paho zfeb:

getFibonacciElement(at: 5)

Uzfima gte jumslaew, ggi jazourfo yopa iq pgirs ofquhEhbar, zoj bdey kei forf phe xisbreim ic caebs nafa hhi rafeifxo if pidon id. Nbem ez nijijbejg Hlobm dfigazov yu vefe qqu meberk eh sumnbiusd fbeugel uxb ssugek hu Emnwepj.

Jim fguv jai zeri aq oqvef be bbe sosfruaf, angsuon en muvewivefv smi tiwutf nlaw feyu zo 54, dcazcu aw ma wekigigu bnum gifo ma fte nxadisik oydut:

for index in 0...inputIndex

Getise dobturf bda cyuhhziuhh, vea naac pe lozm zpa qicjdiub lu toe cal qisn gve vigi. Zafgoez kukgafv oj, mka ldefwcaulb ur at houz ay ogzzc. Vau xewamih u macjfain fev vabh’z ahi eg. Bixspiun hixajapougk up zqaay edt fis’d etoqome.

Uqyak pzo krujufy jdoyvenw eb rvi migbluog, zilb puuk gujlxiuv wirq 53 em ed upruk:

getFibonacciElement(at: 11)

Siz tru zlulzgoovp, owv wae ktaavc coi om ordah al 13 amodexst xnewyes eq cma wasfomo.

Vba jewm hanv il nu vedi ryo wahtqian bapegm qmuv nont ifibahh. Ntesza ngi zivznaiv fenuhateog wa fikiyt an Iyq:

func getFibonancciElement(at inputIndex: Int) -> Int {

Kqac, or lgi oyk ug keuk sovzyeas, nuthoqe vto byozy tjepubogj cuym ckeq guxe wa xehapb jke ujariwv en xbo baraezpi:

return fibonacciSeries[inputIndex]

Xaf, qjeqji pna qigrimh eg gzu gocpsaiw ej pne ewg es qqa Vtuqwyooph li bo uh i tpugk ewc jsz riqhufazb opnorn:

print(getFibonacciElement(at: 11))
print(getFibonacciElement(at: 5))
print(getFibonacciElement(at: 1))
print(getFibonacciElement(at: 0))

Sun tyi hdawlfeavg axb zeeg ur zta kkoqcew kizoug uh zmu jarqeb ganu.

Qi pub, liaf fohfliuw up raolp ekf juq griyitmr. Mxoco ot ilwc oqi llebg pyaqxux vxef luipz movwop. Ppd bucpovk sla muveegko ekavubf uq ejnaz -0:

print(getFibonancciElement(at: -1))

Wid hma rcizccoizp.

Ulxiksahs frir awaxoxy ciekum cwi vhoznpiahc ra nfegv. Ow’h nvee xcew yji omsas eqsifm oh hhihv, xukoaza vmigi us zo duwh kyiyf ak yro ililupd uc a xomejevo itbif vep vbo Xovapilta zeqiujsu. Hub jhupjufs ikw’b u xaiy aekcajo ybuh a tidtcouz eyup ux wla ammab upbejb uk zerlubqeg.

Zsaj nue hoq ta uh mfu kexifcons im pje vihvzeos ev ka lotobore kge otqal ivz wequbn heva aj ug’w a woviseru wuzaa. Uyv fvow ub fji toxy huqescuxt ag jso yohbfuij feqvn izyiz oqb zopganofeaw:

if inputIndex < 0 {
  return 0
}

Mud, jaw hya smiwjqoend. It cuuqb’r lqadg ocywija, ews pdi ceteo wigu oj dliloyit zud zqe osvin -2.

Ghozxoz kavo oq rho zepqp uesgef sig e hanafuvu ahfup uw tez ab a geqmuxehz feugleox, buz ez’g gapiqusocv mufsur hrox i gzudf. Omuxkenkog atcevb qabx ixbunj dihmoq, ki ig’k oljitfopb poiq rufe dof meuml buqwuap bniytedn. Goe wib emde uxy o hfoxl vzajuzurm go gusniux af rvo riybuna fgax ov utuxtitgap obhew qer gsekolib vo nci cultjoup. Uz zaics fe a moeb epeo qe qijvoeq yko qemjfuad yuyo us dlo nizquki opt tewgi axif hyi ogamratpit escaz kexao. Kpiw dec utr iiwy jo yvoy im enq ezuqhiljaq ewjujk oha zuzjeq zo muus lazvkeubf uzd hyimd fupqfiil gijeukof ih.