JavaScript: Values, Types and Variables

7/31/2019 JavaScript: Values, Types and Variables

1/35

Cen|o Kg|e F bttv0''yyy/cen|oogygocjoe/agk Agvz|jibt lz Nvvcjantjgo De}ecgve|q T|njojoi Agkvnoz

]ncueq# Tzveq# nod ]n|jnlceq
http://www.learnnowonline.com/http://www.learnnowonline.com/


2/35


Gl`eatj}eq

Cen|o nlgut @n}nQa|jvt tzveq nod agkvn|jqgoq Uode|qtnod lgtb jkvcjajt nod ervcjajt tzve

ago}e|qjgoq

Qee bgy tg deacn|e nod uqe }n|jnlceq# nq yecc nqtbej| qagve


3/35


Jot|gduatjgo tg ]ncueq# Tzveq# nod ]n|jnlceq Bnodcjoi dntn jq tbe muodnkeotnc tnqh gm

v|gi|nkkjoi cnoiunieq ]ncueqTzveq

]n|jnlceq

@n}nQa|jvt knz qeek cjkjted nod agomjojoiYenhcz tzved cnoiunie# qg }n|jnlceq n|e uotzved

Gl`eat+g|jeoted cnoiunie Tzve qzqtek jq demjojtecz goe gm tbe iggd vn|tq

gm tbe cnoiunie


4/35


@n}nQa|jvt Tzveq

Demjoeq tzveq zgu ano uqe tg yg|h yjtb }ncueq gm djmme|eot hjodq

Anteig|jpjoi tzveq

V|jkjtj}e nod gl`eat tzveqYjtb g| yjtbgut ketbgdqKutnlce g| jkkutnlce


5/35


V|jkn|z Tzveq jo @n}nQa|jvt

Lnd vn|t jq tbnt jt yjcc cjle|nccz ago}e|t }ncueq

m|gk goe tzve tg nogtbe| Qveajnc ;;; gve|ntg|

Tzve Anteig|z Ketbgdq Kutnljcjtzoukle| V|jkjtj}e Zeq Jkkutnlceqt|joi V|jkjtj}e Zeq Jkkutnlce

Lggceno V|jkjtj}e Zeq Jkkutnlceoucc V|jkjtj}e Og Jkkutnlce

uodemjoed V|jkjtj}e Og Jkkutnlcegl`eat Gl`eat Zeq Kutnlce


6/35


@n}nQa|jvt Oukle|q

Ncc oukle|q n|e =4+ljt mcgntjoi+vgjot }ncueqJEEE 954 qtnodn|dOukle|q nq cn|ie nq >/9:9=:1>142=59r>6 162 tgnq qkncc nq 5r>6 +1::#


7/35


Joteie| Cjte|ncq

\ev|eqeot ejtbe| nq lnqe >6 g| berndeajknc Ncc tbeqe n|e }ncjd lnqe >6 }ncueq

5# >66# >66

]ncjd ber }ncueq6r>n5m# 6R>N5M# 6r>6ad4

EAKNQa|jvt dgeqot quvvg|t gatnc "lnqe 2* Qgke @n}nQa|jvt jkvcekeotntjgoq quvvg|tOukle| qtn|tq yjtb n cendjoi pe|g# mgccgyed lz djijtq m|gk 6 tg 9Agde ygot le vg|tnlce EAKNQa|jvt 5'Qt|jat mg|ljdq


9/35


N|jtbketja jo @n}nQa|jvt

Erveated qet gm n|jtbketja gve|ntg|qJoacudjoi ( "nddjtjgo*# + "qult|natjgo*#

"kuctjvcjantjgo*# ' "dj}jqjgo*# nod % "kgducg*Og jotei|nc dj}jqjgo

Kntb gl`eat mg| gtbe| gve|ntjgoq


10/35


@n}nQa|jvt Qt|joiq

G|de|ed# jkkutnlce qe~ueoae gm >=+ljt Uojagdeabn|nate|q

M|gk pe|g tg nq knoz nq yjcc mjt jo kekg|zAgoqjqt gm cette|q# oukle|q# vuoatuntjgo# nod qvnaeqPe|g+lnqed joderjoiEkvtz qt|joi "* bnq ceoitb gm pe|g Og qveajnc tzve tg |ev|eqeot n qjoice abn|nate|

Decjkjt yjtb qjoice ) g| dgulce , ~ugteqAnot kjr tg decjkjt qt|joi Ano ekled ~ugte ogt uqed tg decjkjt qt|joi


11/35


Qt|joi Decjkjte|q

Ejtbe| qt|joi jq }ncjd,)Dgo)t uqe tbnt mggd tg meed tbe dgi#)qbe qnjd/ )Jt)q leeo |eancced lz tbe

knoumnatu|e|/),

),Dgo,t uqe tbnt mggd tg meed tbe dgi#,qbe qnjd/ ,Jt,q leeo |eancced lz tbe

knoumnatu|e|/,)

Ogt }ncjd),Dgo)t uqe tbnt mggd tg meed tbe dgi#,qbe qnjd/ ,Jt bnq leeo |eancced lz tbe

knoumnatu|e|/,)


12/35


Qt|joi Cjte|ncq

Ncc tbe mgccgyjoi n|e }ncjd qt|joi cjte|ncq,, '' no ekvtz qt|joi )) '' nogtbe| ekvtz qt|joi ,Dgo Hjecz, )>/4>4) '' n oukle| |ev|eqeoted

nq n qt|joi ,Kz vnqqyg|d jq )leetce$%_Lnjcez1:


13/35


Cjoe L|enhq jo Qt|joi Cjte|ncq

EAKNQa|jvt 1 |e~uj|eq qt|joi cjte|nc go goe cjoeEAKNQa|jvt 5 nccgyq l|enh yjtb S nt eod gm cjoe

V|glcek jo EAKNQa|jvt 1 lut mjoe jo 50,Mgu| qag|e nod qe}eo zen|q nig gu| mntbe|q S

l|guibt mg|tb go tbjq agotjoeot# n oey ontjgo# S agoaej}ed jo Cjle|tz# nod dedjanted tg tbe S

v|gvgqjtjgo tbnt ncc keo n|e a|ented e~unc/,

Mgccgyjoi jq jo}ncjdqee tbe djmme|eoae7 ,Mgu| qag|e nod qe}eo zen|q nig gu| mntbe|q S

l|guibt mg|tb go tbjq agotjoeot# n oey ontjgo# Sagoaej}ed jo Cjle|tz# nod dedjanted tg tbe S

v|gvgqjtjgo tbnt ncc keo n|e a|ented e~unc/,


14/35


Eqanve Qe~ueoaeq jo Qt|joi Cjte|ncq

Joacude abn|nate|q tbnt bn}e qveajnc kenojoi lzuqjoi no eqanve qe~ueoae

Lnahqcnqb S jdeotjmjeq tbe qveajnc abn|nate|),DgoS)t uqe tbnt mggd tg meed tbe dgi#,qbe qnjd/ ,JtS)q leeo |eancced lz tbe knoumnatu|e|/,


15/35


@n}nQa|jvt Eqanve Qe~ueoaeqEqanve Qe~ueoae Deqa|jvtjgo

S) Qjoice ~ugte g| nvgqt|gvbeS, Dgulce ~ugte

SS LnahqcnqbS6 Ouc abn|nate| "tbntq n lnahqcnqb +pe|g*

Sl LnahqvnaeSm Mg|k meed

So OeycjoeS| An||jnie |etu|o

St Bg|jpgotnc tnlS} ]e|tjanc tnl

SrRR Tbe Cntjo+> abn|nate| qveajmjed lz tbe tygberndeajknc djijtq RR letyeeo 66 nod mm/ Mg| ernkvce#tbe agvz|jibt qzklgc jq Srn:/

SuRRRR Tbe Uojagde abn|nate| qveajmjed lz tbe mgu|berndeajknc dj jtq dddd/ Mg| ernk ce tbe q klgc jq


16/35


@n}nQa|jvt Lggceno ]ncueq

\ev|eqeotq t|ue g| mncqeUqunccz tbe |equct gm qgke cgijanc agkvn|jqgo

@n}nQa|jvt ano ago}e|t noz }ncue tg n LggcenoTbeqe n|e ncc mncqe

g 6 "pe|g* g +6 "oeintj}e pe|g* g ,, "ekvtz qt|joi* g OnO g oucc g uodemjoed

Ncc gtbe| }ncueq n|e t|ue


17/35


T|utbz nod Mncqz

Noz }ncue tbnt ago}e|tq tg t|ue jq t|utbz Noz }ncue tbnt ago}e|tq tg mncqe jq mncqz Ybeo @n}nQa|jvt erveatq n Lggceno }ncue

T|utbz }ncue yg|hq cjhe t|ueMncqz }ncue yg|hq cjhe mncqe

Tbeqe n|e ieoe|nccz e~uj}nceotjm "|equct .;; 6* jm "|equct*

Lut le an|emuc.Tbe |equct }n|jnlce agucd bgcd gtbe| t|utbz g| mncqz }ncueq


18/35


Lggceno Ketbgdq nod CgijancGve|ntg|q Lggceno }ncueq bn}e tyg ketbgdq

tgQt|joi"* |etu|oq ,t|ue, g| ,mncqe,}ncueGm"* |etu|oq t|ue gm mncqe

Cgijanc gve|ntg|q-- NODss G\ . OGT


19/35


Qveajnc ]ncueq0 oucc nod uodemjoed

ouccCnoiunie hezyg|d

No gl`eat# lut agoqjde|ed n qevn|nte tzve Nlqeoae gm n }ncue

uodemjoed Ncqg kenoq nlqeoae gm }ncue# lut jo n deeve| ynzV|edemjoed icglnc }n|jnlce

Tzve jq uodemjoed "cjte|nccz# tbntq jtq tzve*


20/35


uodemjoed

@n}nQa|jvt uqeq jo n mey djmme|eot ynzq ]n|jnlce tbnt bnq leeo deacn|ed lut ogt zet nqqjioed n}ncueMuoatjgo vn|nkete| tbnt tbe anccjoi agde dgeqotv|g}jde n }ncue mg|V|gve|tz tbnt dgeqot erjqt go no gl`eat

N||nz ecekeot tbnt dgeqot erjqt Muoatjgo tbnt dgeqot |etu|o n }ncue

uodemjoed jq |end'y|jte jo EAKNQa|jvt 1# |end+gocz jo EAKNQa|jvt 5


21/35


Uqe oucc g| uodemjoed7

Lgtb keno nlqeoae gm }ncueAno gmteo uqe jote|abnoienlczJo mnat# oucc ;; uodemjoedLut oucc .;; uodemjoed

Leqt nd}jaeUqe uodemjoed tg |ev|eqeot qzqtek+ce}ec# uoerveated# g|e||goeguq nlqeoae gm }ncueUqe oucc tg |ev|eqeot n v|gi|nk+ce}ec og|knc# g| erveatednlqeoae gm }ncue

Jo gtbe| yg|dq# uqe oucc ybeo zgu oeed tg erv|eqqkjqqjoi }ncue

Cet @n}nQa|jvt knonie uqe gm uodemjoed


22/35


Tzve Agkvn|jqgoq

@n}nQa|jvt agkvn|eq v|jkjtj}e }ncueq nod gl`eat}ncueq djmme|eotcz

V|jkjtj}e }ncueq lz }ncueGl`eat }ncueq lz |eme|eoae


23/35


Glèat Agkvn|jqgoq

@n}nQa|jvt agkvn|eq glèatq lz |eme|eoaeE~unc gocz jm tbe tyg }n|jnlceq bgcd n |eme|eoae tg tbeqnke glèat jo kekg|zJm bgcd n |eme|eoae tg tyg djmme|eot glèatq# e}eo jm glèatq n|e tbe ernat qnke# tbez n|e ogt e~unc


24/35


Tzve Ago}e|qjgoq

Mentu|e tbnt knheq @n}nQa|jvt enqz nod bn|dDgeq e}e|ztbjoi jt ano tg jkvcjajtcz ago}e|t }ncueq tgknhe uqenlce jo n qtntekeotDgeqot ncynzq dg ybnt zgu ynot

Nutgkntja tzve ago}e|qjgoqAgo}e|t tg t|utbz g| mncqz ybeo erveatq LggcenoAgo}e|tq noztbjoi tg n qt|joi ybeo erveatq qt|joi

T|jeq tg ago}e|t tg n oukle| ybeo erveatq oukle| Ncqg quvvg|tq ervcjajt tzve ago}e|qjgoq


25/35


Ervcjajt Tzve Ago}e|qjgoq

Zgu ano dg jt zgu|qecm ervcjajtczUqe ybeo jkvcjajt ago}e|qjgoq dgot yg|h mg| zgu G| zgu ynot acenoe| nod acen|e| agde

]n|jguq ynzqY|nvve| gl`eatqTzve ketbgdqIcglnc muoatjgoq

nkgoi gtbe|q


26/35


Mg|knttjoi Ketbgdq nod Vn|qjoiMuoatjgoq Dgot bn}e kuab agot|gc yjtb gtbe| ago}e|qjgo

teaboj~ueqIet n |enqgonlce }ncue jo tbe tzve zgu ynot

@n}nQa|jvt bnq qveajncjped ketbgdq nod muoatjgoqtbnt ij}e zgu agot|gc


27/35


Ago}e|qjgoq Uqjoi Y|nvve| Glèatq

Oukle|# Qt|joi# Lggceno# nod Glèat y|nvve|glèatq

V|g}jde v|gve|tjeq nod ketbgdq mg| ag||eqvgodjoitzveq

A|enteq n Qt|joi glèat nod uqeq ceoitb v|gve|tz ,NvvDe},/ceoitb

Ano uqe tbeqe muoatjgoq mg| ervcjajt ago}e|qjgo


28/35


Oukle| Mg|knttjoi Ketbgdq

Ij}e kg|e agot|gc tbno tgQt|joi"*tgMjred"*tgV|eajqjgo"*tgErvgoeotjnc"*

Ncc tb|ee |guod oukle| g| vnd yjtb pe|gq nqoeaeqqn|z


29/35


Uqjoi ]n|jnlceq

Ynz tg tekvg|n|jcz qtg|e ljtq gm dntn Oeaeqqjtz jo nckgqt e}e|z cnoiunie @n}nQa|jvt }n|jnlceq n|e n ljt djmme|eot


30/35


]n|jnlce Deacn|ntjgo

Ogt |e~uj|ed# lut zgu qbgucd dg jt Uotzved# qg qjkvce0 uqe }n| yjtb jdeotjmje|

}n| aguot8 }n| kjoKqiJD8 }n| cnqtOnke8

Uodemjoed uotjc jojtjncjped Ano deacn|e nod jojtjncjpe jo goe qtntekeot

}n| aguot ; 68 }n| kjoKqiJD ; 1


31/35


]n|jnlce Deacn|ntjgo

Kuctjvce }n|jnlceq jo qjoice }n| qtntekeot}n| aguot ; 6# kjoKqiJD ; 1


32/35


]n|jnlce Anutjgoq nod Igtabnq

]n|jnlce ano bgcd noz tzve du|joi ereautjgo}n| aguot ; 68 3v|gi|nk agde? aguot ; ,Dgo,8

3kg|e v|gi|nk agde? aguot ; mncqe 3zet kg|e agde? aguot ; ,Tbe Duhe gm Yjodqg|,8

Le an|emuc qvcjttjoi na|gqq kuctjvce cjoeq.}n| aguot ; 6 kjoKqiJD ; 1


33/35


]n|jnlce Qagve

Qagve jq qeatjgo gm agde ybe|e }n|jnlce jqdemjoed nod naaeqqjlce

Tyg qagveq jo @n}nQa|jvtIcglncCganc

Cganc }n|jnlce bnq muoatjgo qagve jo @n}nQa|jvt


34/35


35/35

Cen|o Kg|e F bttv0''yyy/cen|oogygocjoe/agk

Cen|o Kg|e.

Tbjq jq no erae|vt m|gk n cn|ie| agu|qe/ ]jqjtyyy/cen|oogygocjoe/agk mg| tbe mucc detnjcq.

Cen|o kg|e nlgut @n}nQa|jvt go QcjdeQbn|e. Jot|gduatjgo tg @n}nQa|jvt
http://www.learnnowonline.com/http://www.learnnowonline.com/http://www.slideshare.net/LearnNowOnline/ch01-introduction-to-java-scripthttp://www.slideshare.net/LearnNowOnline/ch01-introduction-to-java-scripthttp://www.learnnowonline.com/http://www.learnnowonline.com/

Documents

JavaScript: Values, Types and Variables