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This tutorial shows you how to round double numbers with a limit to the precision.
For example, if the double number is 12.12345, limit the number of decimal places from 3 to 12.123. Let’s see an example.
Double-precision after decimal places in dart
There are two ways we can convert double to limit decimal placesto n times.
One way, use the double toStringAsFixed method.
The toStringAsFixed method takes fractionDigits and returns the string representation of double numbers with decimal digits limit fractionDigits.
Syntax:
String toStringAsFixed(int fractionDigits)
The returns String version of a double value.
Convert string into double using double.parse() method.
Another way, use the double toStringAsExponential method.
The toStringAsExponential method takes fractionDigits and returns a string version of a double value with limited decimal places.
Syntax:
String toStringAsExponential([int? fractionDigits])
Return String, which can be converted to double.parse() method
Here is an example
void main() {
double d = 12.12349;
String result = d.toStringAsFixed(4);
print(result);
var result1 = double.parse(d.toStringAsExponential(3));
print(result1);
}
Output:
12.1235
12.123
Conclusion
To summarize, Limit the double floating decimal precision with examples.
