FUNCTIONS Intro

Developer
Milos Stankovic
Size
2,261 Kb
Views
24,288
  1. FUNCTIONS Intro Previews
  2. FUNCTIONS Intro HTML Codes
  3. FUNCTIONS Intro JS Codes

How do I make an functions intro?

What is a functions intro? How do you make a functions intro? This script and codes were developed by Milos Stankovic on 14 September 2022, Wednesday.

FUNCTIONS Intro Previews
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FUNCTIONS Intro - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>FUNCTIONS Intro</title>
</head>
<body> <script src="js/index.js"></script>
</body>
</html>

FUNCTIONS Intro - Script Codes JS Codes

// fja i pozivanje fje
function sayHi() { console.log("PRIMER 1: Hi");
}
// da pozoves fju, koristi ()
sayHi();
// ako je pozoves bez (), rezultat ce biti sama fja
console.log(sayHi);
// ako fja nema return, rezultat ce biti "undefined" u konzoli
// medjutim FJA JE IZVRSENA (varovi dobili vrednost, itd. sta god da fja radi)
console.log(sayHi());
// fja moze biti bilo gde u fajlu, moze da koristi varove definisane van fje
var color;
console.log("PRIMER 2: " + color); // daje undefined
// fja moze da se pozove cak i kad je kod dole (bilo gde u fajlu)
changeColor(); // fja ce promeniti var color u green (default)
console.log(color);
changeColor(); // fja ce promeniti var color u red (case: green)
console.log(color);
changeColor(); // fja ce promeniti var color u blue (case: red)
console.log(color);
function changeColor() { switch(color) { case "red": color = "blue"; break; case "green": color = "red"; break; default: color = "green"; } // return color;
}
var boja = changeColor(); // var ce biti undefined jer nema return u fji
console.log("BOJA JE " + boja);
// fja sa return
var color2;
// posto imamo return(color), dace kao rez. vrednost var-a color iz fje
// bez return-a, rez. bi bio undefined, ali bi se fja izvrsila (color2 bi dobio vrednost "green")
console.log("PRIMER 3: " + changeColor2());
// ovde isto dobijamo green (i sa i bez return-a)
console.log(color2);
// sad necemo dobiti nista u konzoli (jer nema console.log u fji), ali je fja izvrsena i color2 je sada red
changeColor2();
// sto vidimo ovde
console.log(color2);
function changeColor2() { switch(color2) { case "red": color2 = "blue"; break; case "green": color2 = "red"; break; default: color2 = "green"; } return(color2); // sve posle return-a u fji, nece se izvrsiti
}
// return moze da se koristi bilo gde u fji
var color3;
console.log("PRIMER 4: " + color3); // ovde je undefined
color3 = changeColor3(); // dodelimo vrednost var-u koristeci fju
console.log(color3); // ovde ce biti default vrednost
color3 = changeColor3(); // opet dodelimo vrednost var-u koristeci fju, ali sada je ona vec "green"
console.log(color3); // i fja je pretvara u "red"
function changeColor3() { switch(color3) { case "red": return("blue"); case "green": return("red"); default: return("green"); } console.log("This will never be shown."); // ovaj kod se nikad ne izvrsava jer je iza return-a
}
var rezultat, rez;
function nekaFja() { if(1 < 2) { rez = "tacno"; return rez; } // ovde prestaje da se izvrsava if(2 < 1) { rez = "netacno"; return rez; }
}
rezultat = nekaFja();
console.log("PRIMER 5 " + rezultat);
FUNCTIONS Intro - Script Codes
FUNCTIONS Intro - Script Codes
Home Page Home
Developer Milos Stankovic
Username milstanyu
Uploaded September 14, 2022
Rating 3
Size 2,261 Kb
Views 24,288
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