how to convert string to double in flutter code example

Example 1: string to double fultter

var long2 = double.parse("STRING");

Example 2: string to double dart

// String -> double
main () {
    var onePointOne = double.parse('1.1');
    print(onePointOne == 1.1); // prints true
}

Example 3: convert string to double flutter

var long2 = double.parse("STRING");