Question

How to throw an exception in Dart

Answer 1

main() {
    try {
        throw "throw exception";
    } catch (e) {
        print("Exception: $e");
    }
}




/*
run:

Exception: throw exception

*/

 

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Answer 2

void main() { 
   try { 
      test(-7); 
   } 
   catch(e) { 
      print('Number cannot be negative'); 
   } 
}  
void test(int n) { 
   if(n < 0) { 
      throw new FormatException(); 
   } 
}




/*
run:

Number cannot be negative

*/

 

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