parseInt()&parseFloat().js

       /*
                          parseInt(); and parseFloat();
                            parseInt() is used to convert the string into number.
                            parseFloat() is used to convert the string into number.

            */

                           var a = "3.142 is the value of pie";
                           var b = parseInt(a);
                           document.write(b + "<br>");


                           var c = "3.142 is the value of pie";
                           var d = parseFloat(c);
                           document.write(d);