{

# How to round double numbers with limit the numbers with decimal places in Dart/ Flutter By Examples This tutorial shows you how to round double numbers with a limit to the precision.

For example, the double number is 12.12345, limiting 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 places to n times. One way, use the `double toStringAsFixed method`. `toStringAsFixed` method takes fractionDigits and returns the string representation of double numbers with decimal digits limit fractionDigits. Syntax:

``````String toStringAsFixed(int fractionDigits)
``````

Returns String version double value.

Convert string into double using `double.parse() method`.

Another way, use the `double toStringAsExponential method`.

`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.

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