Online JavaScript Compiler

JavaScript example code

Use reduce and toFixed for a numeric summary.

const name = "Anku";
const scores = [82, 91, 76, 88];
const average = scores.reduce((total, score) => total + score, 0) / scores.length;

console.log(`Hello, ${name}!`);
console.log("Scores:", scores.join(", "));
console.log("Average:", average.toFixed(2));

Sample output

Hello, Anku!
Scores: 82, 91, 76, 88
Average: 84.25

Common JavaScript errors

• ReferenceError: Declare variables with const, let or var before using them.
• Unexpected token: Look for missing brackets, quotes or commas near the reported line.
• Infinite loop timeout: Check loop conditions and make sure counters change.