In this tutorial, we will learn how to write a function in JavaScript. It will provide a JavaScript eval() function. We learn how to write programs in JavaScript by using the java eval() function. And we learn adding the strings in javascript.
Write the eval()function:
The Syntax is: eval(string)
In JavaScript eval() function is used to evaluate the code.
It executes the code and returns the evaluation result.
The eval() function is useful in critical situations, and security risks.
It is safer to built-in JavaScript functions or libraries.
Adding strings in javascript using eval() function
EXAMPLE 1:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Adding strings</title>
<script>
var str1 = '({"fname1" : "Navya", "lname1" : "Pendyala"})';
var str2 = '({"fname2" : "Swetha", "lname2" : "Pendyala"})';
var obj1 = eval(str1);
var obj2 = eval(str2);
document.write(obj1.fname1 + " " + obj1.lname1 +"<br>");
document.write(obj2.fname2 + " " + obj2.lname2);
</script>
</head>
<body>
</body>
</html>
Output ; Navyasree Pendyala Swetha Pendyala