Take decimal numbers only in dart/flutter

Question

I have a number that I want to take only the decimal part and convert it to an integer with certain precision.

How can I do that in Dart Language or flutter ?

For example :

turn this 247.64646122587197 into this 6464

Drop the float number and take only 4 decimals and convert it to an integer.

Not specific to dart, but floor((x % 1) * 10000)

Brandon Dyer
– Brandon Dyer

2020-01-14 16:57:42 +00:00
Commented Jan 14, 2020 at 16:57 — Brandon Dyer
– Brandon Dyer, Commented Jan 14, 2020 at 16:57

Crazy Lazy Cat · Accepted Answer · 2020-01-14 17:50:25Z

8

Something like this should work:

((x % 1) * pow(10, 4)).floor()

edited Jan 14, 2020 at 17:50

Crazy Lazy Cat

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answered Jan 14, 2020 at 17:11

Brandon Dyer

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Comments

Dharman · Accepted Answer · 2021-05-19 22:16:20Z

7

double value = 247.64646122587197;
double decimalValue = value - value.toInt();
print(decimalValue.toStringAsFixed(4))

edited May 19, 2021 at 22:16

Dharman♦

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answered May 19, 2021 at 22:10

Saurabh Patwal

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Comments

ArunPratap · Accepted Answer · 2020-01-14 17:16:19Z

5

you can also do that like this

void main() {
    final double abc=247.64646122587197;
    int y = int.tryParse(abc.toString().split('.')[1].substring(0,4));
    print(y);
}

output :6464

answered Jan 14, 2020 at 17:16

ArunPratap

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1 Comment

Abion47 Over a year ago

Technically works, but it's horribly inefficient. This would also throw an exception for numbers that have less than 4 decimal digits. As a rule of thumb, you shouldn't convert a number to a string unless it's absolutely necessary (and you better have a damn good reason for doing so if you are going to end up just converting it right back).

Hian · Accepted Answer · 2020-01-14 17:14:13Z

3

You could try this:

return (247.64646122587197 * 10000).toInt() % 10000;

answered Jan 14, 2020 at 17:14

Hian

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