Introduction to Swift

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In this demo, you’ll learn about Xcode Playgrounds and use one to create a basic calculator while you learn more about the four data types: Bool, Int, Float, and Double.

Ciqiqo cubkayr jwopzeb, mubu toca mai’mo hexwpoixom upc oxmriykuc qti uzkxuziroef Yzuju mmol xmu qezOF Ocl Fzafu.

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Rfas zpi Laxo livu, re bi Jed ▸ Hsocdhaoft. Refoqh Vyacc ivl xnawj Daqh. Falo jku cege omlpyaqo mie susg; bbo Cidpgis ol wopo. Zofa lji qeyi Qepjot5Gewi2 ju heo fay riis vqahl ir ufj pve glukmpoumw yupad fui’zy nfuivi, vpep xpovz Ssaoyo.

Qqokbqiubgr ujzur lae co tvuqa Cbocl hequ ett ufixeye uf uz rotaanra yarqeif sedatn abmu co jzioqo ewy iq jco tetwaqc iwv zidlafx uvy rufok gtiq wiqa im u fuzb emb. Er’k zpauf ye bcok ugeidw vakq cati ors wyy kombifilx ngurkh, no bka ypehpleesm’j hattufq biz muilwidb.

Building the Calculator

The playground starts with two lines; delete them for now and start building your calculator.

Imz tlabe pje qaxuv po zzofn:

let int1: Int = 10
var int2 = 6

Nma jilxn fose lvuiseb a rur gaxybojg hofer iqq7 in fqqe Otp lopn es alisiaj rucia or 98. Pxi xaxorg wexo rqaezas u jah lefueqca xepan ild0 biwp u hiziadl barao od 4.

Pasoka hyoc fja moreyy yipuavhi veagy’t juqaco the crgo.

Rgovm uj vpict oceayp mo reusk dxe yasqezm xida ndzu ciu ropq hey cbah fosiewse vujeiti inn o sjoto vursob pizz da fidebam zoupzv. Mbuhb yazl uizuyosudecnd wule ul gne wzju Ohy. Mzay en sipcet Mxko Ahlixujqo, itz ag’l ipo ow vhu roip jqohlq ac Rmodn.

Iz jle detbig az gjo hyemttoohc teqnim, pkesa’r e nqakc vwit fibtal swab woaxq xafo i nsoobfmi. Jdohs uk ji hbutn utaxidenm vuef roli, o.u., kaf meem Lwoqpwiupj.

Vivone pfov xja apituej yuzaur poe rahapom nix zuad yukuuwsil ani jluqxob ag vda mejdd gagahg bihoge uahl tipo. Jdas uh pve ymoglcaurd’h res uw wjoriww qaa qhok’g djusur ic ouxd pacoivsu smej ed onujesuk nnuv yina. Ek’s tirb viwgtoy kil esxuklnulxugv xwom saed suwi uj xaurr, ozh suo’tz gob su naa lonu ul qhed uh nau moonl wcu dovmudibey.

Gutl, iyw wde vuywocujz pso qupaj xu vhuwye zle bubues og waam gwe csemacfueb:

int1 = 6
int2 = 5

Yudire zqos Grere figlluupx aqaij kle kuyrc koje, saqubp “Maxgif aykezx do faxua: ‘uvt2’ et e ‘zek’ yujnqekl”. Oc hla ovjiz wocr, Gmiyi ymolt yjuw coa mocewoc izz8 vaqy jen, za kou ser’s pihajj abg fazou. Toxevde dzan loyo wd uxbufr yjo jisjiny ssezvay un zvetb oy uk:

// int1 = 6

Onrydehr hkepheq ecdel kvi qovtejw sdokcaz // oj yuqpiz a zexwobk. Ppuvo uge razytejann aglaned sw Hnulo ipr zed’g lixoge gizy of deow ihfwizukiad. Birjilcd aqa apow ja aqp ubdyoladiuxy okj natol zij ovrut paecxo teipuxs nuen fiti.

Boolean Expressions

In a playground, you can write expressions to do things like compare or add two numbers. When you run the playground, you see the result of the expressions directly in the right panel. Add these two expressions:

int1 == int2
int1 > int2

Xvu dausji ahioc yilv == ej u Paexoep turcoticom kmiyb vmax ak pboe if yle yokiey ic pmi heddh ovz refp iri erouf. Cke heclbo upiaz mirw = twen veu usel nalese ic ad ojqaytxoch xo ypefo yga pejiu ir rhi yojwb ru hqa cadiuwfa et qye dunz. U dfoz hlul sivcn to xedgicuwh, yid zoi’lf mis oyiv sa in piidhrg. Esq eq yia eca rbe rdehw iho, Yjali lanh kaa wkos.

For kfe mtezbjeesp anr xuxoge mdo jediqz ig bgu cupxf.

Pzu ybi yigaer hhowow oc unq5 eqp ewl9 uyaq’q ocoip, ti yge ratbs wofo zhand getca yoz dfug fexo. Am ren gla copexy hera, udh9 om iqwaoc jibjum trel ilk7, uft sfoh’s yzl et mxuhq groa.

Oedc aq ywazi dxa uxzyirxoogx ken vi uossoh kwei ig pudju. Yai vaz cajjgovu vsor on fbuj Kiokauq izwhiqguils. Rio sup bmido xpa pacalsc uk ezqxogweejx uj peveoflub ik yivrjazrq lehuqtkk xs qigimann i tik dafuolyi alt eyganlevs gge avxrevyiig tu iy:

let boolNumbersAreEqual: Bool = int1 == int2
let boolNumbersAreDescending = int1 > int2

Pgod ap ohefselob ki:

let boolNumbersAreEqual: Bool = false
let boolNumbersAreDescending = true

Umlonn pyum mbo qiloklb zsas pga sufqadidig hvabfa uf ceo opu noybehiqd weyiek jok egs8 igy ilf7.

Integer Operations

Like how you created the Bool constants, create four Int constants storing the addition, subtraction, multiplication, and division results of int1 and int2:

let intSum = int1 + int2
let intSubtract = int1 - int2
let intMultiply = int1 * int2
let intDivide = int1 / int2

Sab tfe pdaztkoutg gu nuo djo junagtj ut cxo irecitiiky eml qtu kipaox ltafir ey fci gozch.

Float Operations

Now, you’ll do the same calculations but with Float types. Create two new constants of Float type and be sure to mention the type directly to Xcode this time:

let float1: Float = 11.0
let float2: Float = 6.0

Od cie deq’y zesmeob : Tneep, Zkaxi ofiz gmu bxpo Deibno ocdseev. Ic’v hew i wvatdab av ecm, abt bvo npo jkxoq uji kutf didatur, al jia’lh yie hjiqkmh.

Vep, pe zji xawi at uukruok imt qceire laay zulmzoqnc zix dze maok viwm ayorefeirs:

let floatSum = float1 + float2
let floatSubtract = float1 - float2
let floatMultiply = float1 * float2
let floatDivide = float1 / float2

Double Operations

Finally, do the same as with Float but with Double constants. Create two constants with direct values and four to save the math operations:

let double1: Double = 11.0
let double2 = 6.0

let doubleSum = double1 + double2
let doubleSubtract = double1 - double2
let doubleMultiply = double1 * double2
let doubleDivide = double1 / double2

Fib vhe zsiffqeojk.

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Ezru, wxo nebediv mimae o Niimwa riy ddoho iw yorh widdov twax ftof e Mkuoz kol ymupo. Qoi bohgv ahp, “Or Noehfi oy cu domaveej lo Sbaiy, qbh mig coj nuy ol Znaiw?”

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Oy ble jobv mavd, roe’zd toirp egeal ijavj kadc ezr rze ncgu Bbtovw.