double variable into 2 decimal places flutter
double num1 = double.parse((12.3412).toStringAsFixed(2));
// 12.34
double num2 = double.parse((12.5668).toStringAsFixed(2));
// 12.57
double num3 = double.parse((-12.3412).toStringAsFixed(2));
// -12.34
double num4 = double.parse((-12.3456).toStringAsFixed(2));
// -12.35dart round to 2 decimals
import 'dart:math';
double roundDouble(double value, int places){
double mod = pow(10.0, places);
return ((value * mod).round().toDouble() / mod);
}
main() {
double num1 = roundDouble(12.3412, 2);
// 12.34
double num2 = roundDouble(12.5668, 2);
// 12.57
double num3 = roundDouble(-12.3412, 2);
// -12.34
double num4 = roundDouble(-12.3456, 2);
// -12.35
}
OR
double num1 = double.parse((12.3412).toStringAsFixed(2));
// 12.34double 2 decimal places flutter
/// Define an extension:
extension Ex on double {
double toPrecision(int n) => double.parse(toStringAsFixed(n));
}
/// Usage:
void main() {
double d = 2.3456789;
double d1 = d.toPrecision(1); // 2.3
double d2 = d.toPrecision(2); // 2.35
double d3 = d.toPrecision(3); // 2.345
}Copyright © 2021 Codeinu
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