Trusted answers to developer questions
How to cast a string to an integer in Dart
Educative Answers TeamA 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 integer
var b = "20"; // A string
var 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 30
var 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”).
RELATED TAGS
dart
string
int
casting
Copyright ©2022 Educative, Inc. All rights reserved
RELATED COURSES
View all Courses
Keep Exploring
Related Courses
