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How to generate a valid random mail using Jquery or Javascript In this tutorial we will learn how to generate a random unique email address using Pure Javascript. Use below code it will return a function generateEmail() { var allchars = 'abcdefghijklmnopqrstuvwxyz1234567890'; var emailLength = 15; var string = ''; for(var i=0; i<emailLength; i++){     string += allchars[Math.floor(Math.random() * allchars.length)]; } string = string + '@gmail.com'; return string; } var newEmail = generateEmail(); alert(newEmail); Code Explain: We have created "allchars" variable that contains all possible characters that our function will use, if you want to remove numbers from it or add capital letters , you can edit this string. Then we have defined "emailLength" variable , You can change length of email according tou your requirement. Then we are looping until the length and generating random string using Math functions. Finally we are adding postfix em...

How to formatting floating point numbers in javascript In jQuery or javascript when we add or multiple or any mathematical opertaion perform on floating point numbers it gives wrong output . For Example if we add 0.1+0.2 using javascript it gives  0.30000000000000004 instead of 0.3 . so here is the solution of perform mathematical operations on floating point numbers with javascript. We are using 2 js function for this 1. parseFloat   2. toPrecision javascript snippet to solve js floating point numbers wrong output problem. <script> function cal() {  var a=0.1;  var b=0.2;  var c=parseFloat((a+b).toPrecision(10)); //Calculate like this  alert("parseFloat((0.1 + 0.2).toPrecision(10)) = "+c); } </script>