1 · First steps · 8 MIN

Calculate a total

Expressions calculate values.

Multiplication happens before addition. Parentheses let you make the intended order explicit. Access a property on an input object using a dot, such as input.price. Here the input contains whole-number quantities and prices; real payment systems need an explicit rounding policy.

A shopping receipt multiplies each item price by its quantity before calculating a total.

Read the example

const price = 4;
const quantity = 3;
console.log(price * quantity);

12

Your challenge

Return input.price multiplied by input.quantity. Input is an object with both numbers.

Common trap

"4" + 3 makes "43". Keep quantities numeric.