JavaScript -- syntax 3 -- array, javascript -- 3 --

JavaScript -- syntax 3 -- array, javascript -- 3 --
JavaScript -- syntax 3 -- array I. Experiences

 

Ii. Code

1 <! Doctype html public "-// W3C // dtd html 4.01 // EN" "http://www.w3.org/TR/html4/strict.dtd"> 2 21 * Two Methods of array definition in js: 22*1, var arr = []; var arr = [3, 1, 5, 8];23*2, using javascriptArray objectTo complete the definition. 24 * var arr = new Array (); // var arr = []; 25 * var arr1 = new Array (5 ); // The Array is defined and the length is 5.26 * var arr2 = new Array (5, 6, 7); // defines an Array with elements 5, 6, and 7; 27*28*29 */30 31 var arr = [100,]; 32 33 // alert (typeof (arr )); // object type Object34 35 // alert ("len:" + arr. length); 36 37 arr [4] = 348; // The JavaScript Array length is variable 38 arr [1] = "abc"; 39 arr [2] = true; 40 // traverse the array. 41 for (var x = 0; x <arr. length; x ++) {42 document. write ("arr [" + x + "] =" + arr [x] + "<br/> "); 43} 44 </script> 45 </body> 46