CODEWITHSUNDEEP
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Ray Li
Ray Li

Reputation: 7919

How to round a number up in Flutter?

How can a number be rounded up to the nearest whole number in Flutter?

The Num round methods rounds to the nearest integer. How can one always round up?

Upvotes: 17

Views: 22497

Answers (2)

Ray Li
Ray Li

Reputation: 7919

To round up to the nearest whole number in an absolute sense, use ceil if the number is positive and floor if the number is smaller than 0.

The following function rounds numbers up to the closest integer.

static int roundUpAbsolute(double number) {
  return number.isNegative ? number.floor() : number.ceil();
}

Or, use an extension function (6.3.roundUpAbs).

extension Round on double {
  int get roundUpAbs => this.isNegative ? this.floor() : this.ceil();
}

Upvotes: 8

timilehinjegede
timilehinjegede

Reputation: 14033

You can use the .ceil() method to achieve what you want.

Example:

print(-0.1.ceil()); => -1

print(1.5.ceil()); => 2

print(0.1.ceil()); => 1

Upvotes: 32

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