Dart Academy · Lesson

Parsing and Converting Numbers

Turn strings into numbers and back.

Text Is Not a Number

User input and files arrive as strings. The text "42" cannot do math until you parse it into a real number first. 🔄

Call int.parse to turn a digit string into an int. The result is a true number you can add, compare, or store.

void main() {
  int n = int.parse('42');
  print(n + 1); // 43
}