Round half a penny?

Question

Possible duplicates:
round to the nearest 0.10
round JavaScript number up to N decimal places

How can I combine floats like 0.075 to 0.08 in Javascript?

Answer 1

You need to multiply by a hundred (so that the cents are rounded), round up, and then divide by one hundred to get the correct dollar price again.

 var dollars = 0.075; // 0.075 dollars var cents = dollars * 100; // ... is 7.5 cents var roundedCents = Math.round(cents); // ... but should really be 8 cents var roundedPrice = roundedCents / 100; // ... so it 0.08 dollars in the end 

Answer 2

Javascript has three rounding functions, all of which are members of the Math object: round (rounds up or down to the nearest integer), floor (rounds) and ceil (rounds). Unfortunately, all three are only rounded to the nearest integer. However, you can first multiply the amount of your dollar (get a penny), and then use ceil to round to the next penny;

 var money = 0.075; var pennies = money * 100; money = Math.ceil(pennies) / 100; 

Answer 3

Use Math.Round. Adapted from this article.

 var original=28.4531) // round "original" to two decimals var result = Math.round(original*100)/100; // returns 28.452) // round "original" to 1 decimal var result = Math.round(original*10)/10; // returns 28.53) // round 8.111111 to 3 decimals var result = Math.round(8.111111*1000)/1000; // returns 8.111 

Answer 4

 alert(0.755.toFixed(2));