The for
statement provides a compact way to iterate over a range of values.
Syntax
for(initialization; condition; update){
//statements to be executed
}
for loop
execute the statements until the condition evaluates to false.
a. Initialization section executed only
once, at the starting of loop.
b. Condition section evaluated every
time, before executing the loop statements
c. update section executes immediately
after every execution of loop finishes.
for.html
<!DOCTYPE html> <html> <head> <title>for 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>"); for (var i = 0; i <= number; i += 2) { document.write(i + "<br />"); } </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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