JS Numbers
JavaScript Number values include integers and fractions. Many decimal fractions cannot be represented exactly.
Where to run this
This example uses the JavaScript console playground. Select Run to execute it; the example does not run on this lesson page.
A practical example
const total = 0.1 + 0.2;
console.log(total);
console.log(total.toFixed(2));
What happens
The raw value shows floating-point rounding; formatting gives 0.30.