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How to cast a string to an integer in Dart
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.
Code
The following code snippet demonstrates the usage of the int.parse method:
import 'dart:convert';void main() {var a = 10; // An integervar b = "20"; // A stringvar c = int.parse(b);print(a + c);}
The method also accepts strings that start with ; i.e., the format for hexadecimal numbers. Consider the code below which converts a hexadecimal string into an integer:
import 'dart:convert';void main() {var a = "0x1E"; // Hexadecimal value for 30var b = int.parse(a);print(b);}
The method will throw a
FormatExceptionif the input is invalid. The method won’t accept characters that are not radix-10 or hexadecimal (e.g., “abc”).
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