toStringAsPrecision abstract method

String toStringAsPrecision(int precision)

Converts this to a double and returns a string representation with exactly precision significant digits.

The parameter precision must be an integer satisfying: 1 <= precision <= 21.

Examples:

1.toStringAsPrecision(2);       // 1.0
1e15.toStringAsPrecision(3);    // 1.00+15
1234567.toStringAsPrecision(3); // 1.23e+6
1234567.toStringAsPrecision(9); // 1234567.00
12345678901234567890.toStringAsPrecision(20); // 12345678901234567168
12345678901234567890.toStringAsPrecision(14); // 1.2345678901235e+19
0.00000012345.toStringAsPrecision(15); // 1.23450000000000e-7
0.0000012345.toStringAsPrecision(15);  // 0.00000123450000000000

Source

String toStringAsPrecision(int precision);

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/num/toStringAsPrecision.html