JavaScript floating-point numbers keep the two-bit decimal point sample code

  This article mainly introduces the JS floating-point number to keep the two-bit decimal point sample code (rounded) the need for friends can come to the reference, I hope to be helpful to everyone

  Code as follows: Var changetwodecimal_f= function (Floatvar) {      var f_x = parsefloat (Floatvar);   &nbs P   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     & nbsp     s_x + = '. ';      }       while (s_x.length <= Pos_decimal + 2) {          s _x + = ' 0 ';      }       return s_x;  }     JS provides the rounding function:   code as follows: JS rounding function toFixed (), the inside of the parameter is to keep the number of decimal digits.     <script language= "JavaScript" >    document.write ("<H1>JS reserved two decimal example </h1>< Br> ");        var a=2.1512131231231321;        document.write ("Original value:" +a+ "<br>");        document.write ("Two decimal point:" +a.tofixed (2) + "<br> Four decimal Places" +a.tofixed (4));     </script>