JavaScript

, JavaScript. JavaScript, MX, . JavaScript, , , "" , . .

, , Web-, . .

.html. ? , () , Web-..html, , .

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, , . ; , , . , (, , , , ), ( ).

:

b = z / t;

z t . , "/" , "=" - . ";", , , , ; , JavaScript .

:

sum = a1 + 2 + 3 - 20; square = * ;

a1, a2 , 20 sum.

square.

, :

s = ( + b) / ( - d);

, , . , :

s = a+b/c d;

, , d. , , d . , .

JavaScript :

= + 1;

. , . :

+= 1;

:

, , , . var:

var a1, a2, 3, ,

, . , . . .

, . , :

= 10;

s = " ";

, ( ). (, Web-, , , , .)

, . , . , . . , , ; .

var arr;

arr[0] = 1;

arr[1] = 2;

arr[5] = arr[0] + arr[1];

, ; (). , , , . , , JavaScript .

. :

var arr2;

2[0] [0] = 0;

2[0][1] = 1;

2[1] [0] = 2;

2[1][1] = 3;

, . , if-else . - , - . , , if, , else. , if-else .

.

if (x== 1)

f = 2 else

f = 12;

, , f 2, 12.

- if-else , .

if ( == 1) {

f = 2;

h = 3; } else {

f = 12;

h = 14; }

, , . JavaScript .

"" if-eise, else. , , cod .

if ( == 1) ( f = 2; h = 3; )

- switch-case. if-eise.

switch () { case 1 :

out = "";

break; case 2 :

out = "";

break; case 3 :

out = "";

break; default :

out = " "; }

1, out ( case l). 2, out ( 2), . . , case, default, out .

, - cod , switch. .

for - ( ) , . . . - , , . , .

for .

for (i = 1; i < 101; i++) { a = a * i; b = b + i;

}

JavaScript :

  • i , . . ;
  • 1 (i =1);
  • 100, . . , i 101 (i < 101);
  • (i++; ++ - , , , ). ( ++ .)

100, b 1 100.

, JavaScript , . , - . do-while while.

do-while.

do {

= * i + 2;

i = ++i; } while (a < 100);

, 100. , , , .

while , , , .

while (a < 100) { a = a * i + 2; i = ++i; }

break , continue , . . (, ).

while (a < 100) { i = ++i;

if (i > 50) break; if (i < 5) continue; a = a * i + 2; }

, .

cod , . cod, , . , .

, .

function valuePlus2 (v) {

var ;

= v + 2;

return ; }

valuePlus2 v (. ). , , , "" ( ). v 2. (return ).

? , :

h = d + valuePlus2 (r) ;

vaiuePlus2 . , .

, . (, !)

function valuePlus2(v) { return v + 2; }

. -, "". -, , .

:

function someFunc1() { return 2+2; }

:

function valuePlus3(v) { return valuePlus2(v) + 1; }

JavaScript . .

: v=|| +// + . , . .

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II. WEB-
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12. Web-
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