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js floating point numbers retain two decimal points sample code (rounding)_javascript skills

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Release： 2016-05-16 17:07:03

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Copy code The code is as follows:

var changeTwoDecimal_f= function (floatvar){ 
 var f_x = parseFloat (floatvar); 
 if (isNaN(f_x)){ 
 return '0.00'; 
 } 
 var f_x = Math.round(f_x*100)/100; 
 var s_x = f_x.toString(); 
 var pos_decimal = s_x.indexOf('.'); 
 if (pos_decimal < 0){ 
 pos_decimal = s_x.length; 
 s_x = '.'; 
 } 
 while (s_x.length <= pos_decimal 2){ 
 s_x = '0'; 
 } 
 return s_x; 
} 

Rounding function provided by js:

Copy code The code is as follows:

js rounding function toFixed( ), the parameter inside is the number of decimal places to retain. 

 

Related labels：

rounding floating point number

source：php.cn

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