<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>JavaScript Error Handling finally Statement </title> </head> <body> <script> // Assigning the value returned by the prompt dialog box to a variable var num = prompt("Enter a positive integer between 0 to 100"); // Storing the time when execution start var start = Date.now(); try { if(num > 0 && num <= 100) { alert(Math.pow(num, num)); // the base to the exponent power } else { throw new Error("An invalid value is entered!"); } } catch(c) { alert(c.message); } finally { // Displaying the time taken to execute the code alert("Execution took: " + (Date.now() - start) + "ms"); } </script> <p><strong>Note : </strong> The <code>Math.pow(base, exponent)</code> method returns a number representing the given base taken to the power of the given exponent i.e. <code>base<sup>exponent</sup></code>.</p> </body> </html>
