round

Rounds a number to a specified amount of digits.

• Use Math.round() and template literals to round the number to the specified number of digits.
• Omit the second argument, decimals, to round to an integer.

const round = (n, decimals = 0) => 
  Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);

round(1.005, 2); // 1.01