Flutter string to double

Parse source as a double literal and return its value . Accepts an optional sign ( + or – ) followed by either the characters “Infinity”, the characters “NaN” or a floating-point representation. A floating-point representation is composed of a mantissa and an optional exponent part.

Parse(String) Converts the string representation of a number to its double-precision floating-point number equivalent . Parse(String, NumberStyles) Converts the string representation of a number in a specified style to its double-precision floating-point number equivalent.

A string can be cast to an integer using the int. parse() method in Dart. The method takes a string as an argument and converts it into an integer .

Parse source as a, possibly signed, integer literal and return its value . The source must be a non-empty sequence of base- radix digits, optionally prefixed with a minus or plus sign (‘-‘ or ‘+’).

Parses a string containing a number literal into a number . The method first tries to read the input as integer (similar to int. parse without a radix). If that fails, it tries to parse the input as a double (similar to double.