+ 1

How does the for in this code work? What does x represent?

<html> <body> <div id ="demo"> <p>some text</p> <p>some other text</p> </div> <script> var a = document.getElementById("demo"); var arr = a.childNodes; for(var x=0;x<arr.length;x++) { arr[x].innerHTML = "new text"; } </script> </body> </html>

16th Apr 2020, 8:49 PM

3.14

2 ответов

in for cycle, the first element (x) is used to specify the index of array. array[index]; An example: var myarray = ["Python", "Java", "Ruby"]; myarray[0]; // Python myarray[1]; // Java myarray[2]; // Ruby SO, WE'VE: for(var x=0;x<arr.length;x++) { arr[x].innerHTML = "new text"; /* like write: arr[0].innerHTML = "new text"; FIRST CYCLE arr[1].innerHTML = "new text"; SECOND CYCLE because x = x+1 */ }

16th Apr 2020, 9:20 PM

LoCoding