JavaScript gets decimal _javascript tips for any float after two decimal places

Use JavaScript to take float type two digits after the decimal point, example 22.127456 to 22.13, how to do?

1. This method is least recommended:

function Get () { 
var s = 22.127456 + ""; 
var str = s.substring (0,s.indexof (".") + 3); 
alert (str); 
}

2. Use regular expressions to get:

function Get () { 
var a = ' 23.456322 '; 
var anew; 
var re =/([0-9]+\.[ 0-9]{2}) [0-9]*/; 
anew = A.replace (Re, "$"); 
alert (anew); 
}

3. More advanced Applications:

function Get () { 
var num=22.127456; 
Alert (Math.Round (num*100)/100); 
}

4. The simplest and most convenient:

function Get () { 
var num = new number (13.37); 
num = num.tofixed (2);//2 is automatically rounded to 
alert (num) for the number of digits after which you want to get a decimal;