Please how to round to the nearest decimal tenth? Example : 0.56 => 0.5; 2.78 => 2.8
Multiply by 10, then round then divide back by 10:
const round = (num) => Math.round(num * 10)/10
console.log(round(0.56))
console.log(round(2.78))Then using the same logic, you can write a general rounding function:
const round = (num, decimal) => Math.round(num * 10**decimal)/10**decimal
console.log(round(5.142533564, 4))
console.log(round(62.5236, 2))