What is the StudyGrid JavaScript tutorial?

The StudyGrid JavaScript tutorial is a full beginner track: variables, functions, arrays, if/else, the DOM, events, storage, and fetch. Each chapter has copy-and-run examples.

Should I run power of two? examples locally for better learning?

Yes. Use the browser editor on StudyGrid for a quick check, then Download the example and run it on your computer. Local runs show real errors and the real toolchain, which is one of the fastest ways to learn power of two? in this JavaScript Labs JavaScript lesson (Power of two?).

Is the JavaScript editor the same as Try Python?

No. Try JavaScript is a live page plus a console at /javascript/try. Try Python stays at /try. JavaScript lessons never open the Python editor.

Do I need to install anything to learn JavaScript?

No. Open a chapter, click Try it in JavaScript, and the page and console update in the browser.

Where should I start the JavaScript tutorial?

Start at JavaScript Intro, then Where To, Output, and Syntax. After variables and functions, continue to the DOM and events. Use Next at the bottom of each chapter.

Is the JavaScript tutorial free?

Yes. The JavaScript studio on StudyGrid (studygrid.in) is free: dashboard, chapters, and the live editor.

Power of two? | JavaScript Labs

Read the question, write JavaScript on the right, then Run or Check.

QuestionHint and solution stay closed until you open them

Read n; log yes if it is a power of two, else no.

Input. Integer ≥ 1.

Output. yes or no.

Examples

Example 1

Input

Output

yes

Example 2

Input

Output

no

Hint

n > 0 && (n & (n - 1)) === 0

Show correct code

Peek only after you have tried. You can still Check your own version.

const n = Number(readLine());
console.log(n > 0 && (n & (n - 1)) === 0 ? 'yes' : 'no');

main.jsconsole.log · readLine() · Ctrl + Enter

Program input (stdin) — used by readLine()

ResultIdle

Run to see output. Check grades the tests.