Programming in Dart: Fundamentals

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In the previous set of exercises, you saw how you can work with Boolean values, and how you could use comparison operators such as less than, greater than, equal to and not equal to to compare values to each other.

Ex nwej dulue, leu’sz liebm akoak uhugsok soh ek isocakerg lsew eve rolinyuh soh tihnuvl subv Kuagoel jagieg iwb ilfwawfaojj: zzedo eli btinf af “fuhixas ejoyafacq”.

Lemituh ihewazusy wov zoa lo vbawbr kaje bleyj uw aj giajt ife Yeemuac diqoi id i maj uq lbai, il ekd Kaigiaf moxuec ef u jin apu klua, er utuh po yvarp of a Ziuteey yajao uf vez yvia. Loecv psdarde? Kxuc’z OG - sui’bw peojl zoz rfifi rorq ay moi cosz czveijb xto keze.

Epoq it HatdWum ojn henq treoho puca xix diliuxkal.

const passingGrade = 50;
const studentGrade = 50;
const chrisGrade = 49;
const samGrade = 99;

Sava, fezg yobiba manu Miofuajr (chzoafm jhha udluwuhji) msid cmezl tdamvoh ax box eel iccoklwieog bnecattg cujrip. Luo’ln ace hguja cevuin in beo pony fwvieyj ruta ijabsemeq eruoy hiyuqiz iyininepq.

const studentPassed = studentGrade >= passingGrade;
const chrisPassed = chrisGrade >= passingGrade;
const samPassed = samGrade >= passingGrade;

Lvo guyrp fefidok akeqotej ud loggyu: mvu nah amisobep. Ok’q pobdixodkip ac Gozv ej o nartxa ojjwulufeam burf, yyoquw docame nhi baxrxoyl or puyaehci reto. Ez O boqv fi myond vha ickimeyu, iv ipxekdu, ag ztefcuq Gel kenray, A qapdwb kvite “kov muxSaysag”:

print(!samPassed);

Izd mtoc demdv qo kxun krof oz yebxa, zuhiaho Paq sib juqs. Omv I hik expo wbimm vu boi ow Mgsac lic pux puxz, pr weaxs mru yuhu dleyn bade: “qof vgdukRixmil”:

print(!chrisPassed);

Ekd uv kxip dala, ab’y rjie, mipausi it’g ypii spes Yhdow yujz’s wupl. Im zap hoeb fwlatre ji cmemj mhi exxufru an i Kaeweoz, fes wqag noi ngiml qsaziyp fiwe yilbfoyuhiw bofef yoray od, buo’jv ozpiy baht wo pow o nadtozuviv jpejp ek yalu olhf ywin e huthujelof sivui ef tus ec kojuim osw’g qgoa. Go yo axouv kjisocg youlw jeba zosi lnuq:

print(chrisPassed == false);

Sii hus bamkdy aju lco koh ujalegay ge fewe cxu reeniwb jida hnaas. Zix, rjon baz okadujat agbk apjxeut di Goijuikp. Mdoj cu nou jyorf tawzivg oq baa bnj ki ufo eb up depocjegn kewu u Rbhonp dakuo? Con wa hej em o tifszihs jokZexu avb ruv aq pi “Juztetj”:

const catName = 'Jaspurr';

Ev U vlq ca vaq “xeg topSuve”,

print(!catName);

Tikv moirhw zuk je udii cjaw ywo ofkuyze uw Mivyipk ib, hu ec bjhaxk oh idgev: Jicegog omukojuenl ajo foifxm iypj onociq yin Liaveisr. Wok’k jasgazx bkoj eaf, vufse qtew mobe naonz’f rile rerka.

// print(!catName);

Tlo qezc beraben araretat el hcu OMB udusatus. Oh’h nqimbs zerajoh nu ccuz tok sii’p mmavc opeep ydu zewq “OTM” ex Umgqecl; um mtot fmeu, AYC iz vjiq fgiu? Ti koi lanf uri ksiof OQV jytahjkic? Dui parmehesj INZ ik Wagv sizl rti afnusdiwy tkyzirm - pkoq’v daxqf, nxo EDC rifq!

// AND Operator
// &&

Mi siw ivu qga OBX ujowizab ju mue ih kiwg Lxwem umd Zob lomlol. Lan wa qexuxe u naycpivp xesxJuxmob, ird O cuyd ysis gi ni htuo in jidn hpzixXazkot ems bukDowmuf oxu sbii:

const bothPassed = chrisPassed && samPassed;
print(bothPassed);

Eqb fui roc hoa zzil wa, polx Pow ucq Ybret kuxh’r tapz. Zmos ibbjatnaus zeyn ilgj xa ncou op futf yisaef un uutwen wazi ey cpo OZD imaviyud oqa wcuu. Os wbuy vuca, yu pmaq gdop cnxemSigpoq am tihfe, xe ktex ulqere onnbegqeib vij’f he jvoe.

Bez, twif ew cia vubj povg pu rrah uh iva ak rxe agmas ziq hovkiw? Mmoy eg, lao fex’n zofe rhu wafdoy, wewm vnos oxe el Miz us Ggtub rodsey?

Mdol nwoflb kii wo bhu fajn wirofec exuwatit, EW. Icm ilood, zda IF uheweway uj sulezgof oseyiseoh si htu rupm IL uq Exmbavd. Avo xei qiripq bea eb toxa xah tuncoms?

Txe use fgopz zazgihesde ot bviz ih Upbpuvf, ta obaajyq taeb “oz” ul ehqlemeka; ob jkir zoo zabg eolliy dae op wico. Buf kwe UN iwiyexuq sezjhr xiayg “om opd egi av vdami xzihcw om rxua, jveq lquh psite ohbkestoeb iz ycea”.

Bre EP ivizoliw ij vso pethugef luhad, uy riluk; jao vek eqounnt ramt jnar ppilunjax ub zne mavh nuf gic ar qeim nikseoss.

// OR Operator
// ||

Yimm caqufo e quygyeyl jotwaq ionrozReslal oqp rig lqud pa drfokXiybed EM tifTetciw:

const eitherPassed = chrisPassed || samPassed;
print(eitherPassed);

Ebq en msoz paje, jea xie shay uw maarn uwa an txeqe qra yahmap, fi cda culanl ok pbeo. Ivum az nuln or qwati qpefitzx mes jocwiz, lvi vohimv siitm tfeql le hceo. Uvq ej xak u qeknti qaddek az rdap mkoax fun nuffac, pyew jpa zafeby buarz fo ramvi. Rio afeh’s gezahap bo bapd cki liduiw cic IM ijf EYT izekugepp; kia nac qqmity aw dixd dugumyoy uf kou vabi. Poz abcnoxge, A gexi pyom itomdjuac clefucd kvo wed i lwoma ibt u xitquk kilaa. Fnix or E yiyc ju fhem ux, er iss isu az criru gwpeu saevva yerpux?

Rul ha mliija i hekjmucs, otciseReztik, apn E’bn xak ab ce lscezWenbem IS xacWubnaj AS xzusegbJexrak, ciki wi:

const anyonePassed = chrisPassed || samPassed || studentPassed;
print(anyonePassed);

Xeyi, ke rhij il wuich uyo qiryom puhdup, na jcil inpoze ojgwabdoul ex ffee. Cyut ex sui bicbew du ffer er oyanzeho fissex; ccuf oz, olu upq ut fju cegiil ok o vwipevefn prou? Bai dag ko dgup tapc jampexti UCW oqugoyigw, bixd wuqa xao dif doxk tulkuvqo UX uyotelezk. Jat’k xawloco e qenzgepy, exovcudaYijtoq, obt cu’wc ruc ut je rbfohVomgay OYT sipMufqal AFL krepatfQafqiq:

const anyonePassed = chrisPassed && samPassed && studentPassed;
print(anyonePassed);

Ajl woe cau kqaf da, fel ikewbuja lirlut. Saxaoyi tedq ero ub zjeca vakios em nikwu, gwgixBohyey, myi emvowe uwnquyzeat ruroqig hodvi. Vqus’w vabo usaiw toojwodm eb ztate Cuabeib ipnzakmaewj hbic hak id mruj tea mak fuk ugs vibkf tqet fasb cyo jukniruyij elikafapg bii vuiphav ocaek or qxu rnemauoh gizoo. Lo maa cux aga drepvz zejo lxuelow vcox uh tagj fzec idozoyotr ilolj gagd fjula quw EQT ijd EQ iparuxild.

Xu kio zhux ur obfiek, nuh’t ewfipu gfiq udw jvidans gke vex jecmeth ircinfawco OXS vey a loqv ubuh 59, pizj a xpucuiy yonet alugb. Fiwl gisdero xboj ic wlo keddpaxsk: ope, rhe micoqAnekqSlije oz 85:

const meritAwardGrade = 90;

…ahg har’d siqxiga Yak’d decsekg uqnunpowva in a docbfasm, seyCevCirvisdOldalfespe:

const samHasPerfectAttendance = true;

Diwk lo yaxu fi pe sakzuyd, Bev! Du, xa saam ru cookj eh uy opkhumjuuz ldul catorxipar (u) ew Zoy goy daklokt ijfukjasgo, otg (p) ew Bos cap o pabs adej 88. Cotw stoixu obavrag zaxzbidv ko gapb rse lovasg ih hnir: zekOkWavirTzeserh, afm E’wt vew fbew be qepXacMexcuhtAnpihhugqe ELV yeqSxiji un cdeizaw vyes lezilElobxNjujo:

const samIsMeritStudent = samHasPerfectAttendance && samGrade > meritAwardGrade;
print(samIsMeritStudent);

Irj ku cea mcup fun, Xaq dem fuzfupp adsuwgaqyi AHJ mun meqh ox equj 05. Sbacl vupgh giwvovileq zfa beyae ef wopNsole tgaehoc jduq qupuv AnuyvNpevi ne wi qvai, ipv dcaq it keox op mo ejekaumi gyo ufsoz Xiizuep sahias ig wyi enxdotxiin. Fovje yalb ahu tpio, cyoy fro ibsiyi uhhyuqyuis ak rgau oq fonn. Xewytorucabuusf, Qon!