javascript zero padding function collection_javascript skills

When outputting an integer, if you need to add zeros at the front or back to a certain length, you can use the following function.

Copy code The code is as follows:

function padLeft(str,lenght){
if (str.length >= lenght)
return str;
else
return padLeft("0" str,lenght);
}
function padRight(str,lenght){
if(str.length >= lenght)
return str;
else
return padRight(str "0",lenght);
}

before number Automatic zero padding function
function
function xx(a,b,c)
{
....
}

parameters
xx(98,102, 4)

Result

0098 0099 0100 0101 0102
-------------------------- --------------------------
I wonder if everyone understands?

Give a starting value (any positive integer less than B), an end value (any positive integer greater than A), and a limit length value (any positive integer), the function can be automatically generated A number, automatically padded with zeros in front
The following is the implementation code

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Enter 1, Then it becomes 001, 2 is 002, 10 is 010, and so onCopy code

The code is as follows:


/**Format the number as a fixed-length string, with 0s added in front
* Parameters:
* Source The string to be formatted
* Length The length of the string to be obtained
*/
function FormatNum(Source,Length){
var strTemp="";
for(i=1;i<=Length-Source.length ;i ){
strTemp ="0";
}
return strTemp Source;

} <script> function addZero(a,b,c) { while(a<b) { t=a+""; while(t.length<c)t="0"+t; a++; document.write(t+"<br>"); } } addZero(1,10,5); </script>