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javaintegerrounding

Android/Java: Rounding up a number to get no decimal

How to round up a decimal number to a whole number.

3.50 => 4

4.5 => 5

3.4 => 3

How do you do this in Java? Thanks!

Solution

  • And if you're working with only positive numbers, you can also use int i = (int)(d + 0.5).

    EDIT: if you want to round negative numbers up (towards positive infinity, such that -5.4 becomes -5, for example), you can use this as well. If you want to round to the higher magnitude (rounding -5.4 to -6), you would be well advised to use some other function put forth by another answer.