while
statement executes a block of statements until expression is true
Syntax
while
(expression) {
//statements
}
while.html
<!DOCTYPE html> <html> <head> <title>while loop</title> </head> <body> <script type="text/javascript"> var number = parseInt(prompt("Enter a number", "10")); document.write("<h2>Even numbers from 0 to " + number + " are </h2>"); var i = 0; while (i <= number) { document.write(i + "<br />"); i += 2; } </script> </body> </html>
Load above
page in browser, it prompts for a number, and print all the even numbers from 0
to the number given by user.
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