[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.feryl.cz\/slovnik-programatoru-konstanta\/#Article","mainEntityOfPage":"https:\/\/www.feryl.cz\/slovnik-programatoru-konstanta\/","headline":"Slovn\u00edk program\u00e1tor\u016f &#8211; konstanta","name":"Slovn\u00edk program\u00e1tor\u016f &#8211; konstanta","description":"Konstanta je slovo ciz\u00edho p\u016fvodu, kter\u00e9 ozna\u010duje n\u011bco, co je st\u00e1l\u00e9 a nem\u011bn\u00ed se to. P\u0159eveden\u00edm do \u010desk\u00e9ho jazyka by se konstanta dala popsat jako st\u00e1l\u00e1 hodnota. S t\u00edmto pojmem se m\u016f\u017eeme setkat na vysok\u00fdch \u0161kol\u00e1ch, nebo i n\u011bkter\u00fdch st\u0159edn\u00edch \u0161kol\u00e1ch s ur\u010ditou \u00farovn\u00ed v\u00fduky matematiky. Tak\u00e9 program\u00e1to\u0159i po celou dobu sv\u00e9 kari\u00e9ry pracuj\u00ed s&hellip; <div class=\"readmore-wrapper\"><a href=\"https:\/\/www.feryl.cz\/slovnik-programatoru-konstanta\/\" class=\"more-link\">P\u0159e\u010d\u00edst <\/a><\/div>","datePublished":"2022-03-31","dateModified":"2024-07-04","author":{"@type":"Person","@id":"https:\/\/www.feryl.cz\/author\/devene\/#Person","name":"devene","url":"https:\/\/www.feryl.cz\/author\/devene\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/fb50772173929303fbe6024f179e4dd9837c71f6efc661bdb046860d442d05b5?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/fb50772173929303fbe6024f179e4dd9837c71f6efc661bdb046860d442d05b5?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"feryl.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.feryl.cz\/wp-content\/uploads\/programov%C3%A1n%C3%AD.PNG","url":"https:\/\/www.feryl.cz\/wp-content\/uploads\/programov%C3%A1n%C3%AD.PNG","height":0,"width":0},"url":"https:\/\/www.feryl.cz\/slovnik-programatoru-konstanta\/","about":["Slu\u017eby"],"wordCount":409,"articleBody":"         Konstanta je slovo ciz\u00edho p\u016fvodu, kter\u00e9 ozna\u010duje n\u011bco, co je st\u00e1l\u00e9 a nem\u011bn\u00ed se to. P\u0159eveden\u00edm do \u010desk\u00e9ho jazyka by se konstanta dala popsat jako st\u00e1l\u00e1 hodnota. S t\u00edmto pojmem se m\u016f\u017eeme setkat na vysok\u00fdch \u0161kol\u00e1ch, nebo i n\u011bkter\u00fdch st\u0159edn\u00edch \u0161kol\u00e1ch s ur\u010ditou \u00farovn\u00ed v\u00fduky matematiky. Tak\u00e9 program\u00e1to\u0159i po celou dobu sv\u00e9 kari\u00e9ry pracuj\u00ed s konstantami. Je d\u016fle\u017eit\u00e9 porozum\u011bt, jak funguje a jak s n\u00ed pracovat. Co je to konstanta https:\/\/www.strelec.pro\/slovnik-vyvojare\/co-je-to\/konstanta v programovac\u00edm jazyku a jak s n\u00ed nakl\u00e1dat? P\u0159i vytv\u00e1\u0159en\u00ed t\u0159eba jen jednoduch\u00e9ho programu je t\u0159eba zadat n\u011bjak\u00e1 data, se kter\u00fdmi bude program pozd\u011bji pracovat. M\u016f\u017ee j\u00edt o \u010d\u00edsla, slova \u010di cel\u00e9 objekty. P\u0159i zad\u00e1van\u00ed nap\u0159\u00edklad \u010d\u00edsel si mus\u00edme d\u00e1t pozor, jestli \u010d\u00edslo, kter\u00e9 chceme pou\u017e\u00edt, je po celou dobu u\u017e\u00edv\u00e1n\u00ed nem\u011bnn\u00e9. M\u016f\u017ee j\u00edt nap\u0159\u00edklad o danou konstantu hodnoty Rudolfova \u010d\u00edsla zvan\u00e9ho tak\u00e9 jako \u201cp\u00ed\u201d. Toto \u010d\u00edslo se nem\u011bn\u00ed za \u017e\u00e1dn\u00fdch okolnost\u00ed. P\u0159i psan\u00ed jednoduch\u00e9ho programu (dejme p\u0159\u00edklad: program pro v\u00fdpo\u010det obsahu kruhu), zad\u00e1v\u00e1me v\u0161echny pot\u0159ebn\u00e9 \u00fadaje do vytvo\u0159en\u00e9 \u201crovnice\u201d, kter\u00e1 n\u00e1m pak p\u0159i zad\u00e1v\u00e1n\u00ed ur\u010dit\u00fdch hodnot bude po\u010d\u00edtat to, co pot\u0159ebujeme. Kdy\u017e se v pr\u016fb\u011bhu budeme sna\u017eit zm\u011bnit na\u0161i hodnotu \u201cp\u00ed\u201d d\u00e1le v programu, nebude cht\u00edt pak po\u010d\u00edtat d\u00e1le. Opakem konstant jsou takzvan\u00e9 variabiln\u00ed hodnoty. Tedy hodnoty, kter\u00e9 se mohou m\u011bnit. Je t\u0159eba si ur\u010dit o jak\u00fd druh hodnoty se bude jednat, jestli slovn\u00ed, nebo \u010d\u00edselnou \u010di jakoukoliv jinou. Variabiln\u00ed hodnoty zad\u00e1v\u00e1me, kdy\u017e v\u00edme, \u017ee jejich hodnota nebude st\u00e1l\u00e1 a bude se m\u011bnit v z\u00e1vislosti na zm\u011bn\u011b dat se kter\u00fdmi chcete t\u0159eba po\u010d\u00edtat ji\u017e zm\u00edn\u011bn\u00fd obsah kruhu. Abychom si to shrnuli, konstanta p\u0159i psan\u00ed jednoduch\u00e9ho programu na v\u00fdpo\u010det kruhu bude hodnota \u201cp\u00ed\u201d, variabiln\u00ed hodnoty budou obvod kruhu a jeho pr\u016fm\u011br. Pro podrobn\u011bj\u0161\u00ed popis, co je to konstanta a jak se chov\u00e1 v r\u016fzn\u00fdch programovac\u00edch jazyc\u00edch, je doporu\u010deno pro\u010d\u00edst odbornou literaturu.                                                                                                                                                                                                                                                                                                                                                                                          4.2\/5 - (13 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Slovn\u00edk program\u00e1tor\u016f &#8211; konstanta","item":"https:\/\/www.feryl.cz\/slovnik-programatoru-konstanta\/#breadcrumbitem"}]}]