In this blog we will discuss on how to resolve Too few positional arguments: 1 required, 0 given.

I was trying to learn Named parameters in flutter.
Below is my code to multiply two numbers in flutter.

void main() {
  int result=multi(b: 3);
  print(result);
}
int multi(int b){

  return 2*b;
}

while trying to execute getting below screenshot error.

To resolve the above error modify parameter b in below function

int multi(int b){

  return 2*b;
}

as

int multi({required int b}){
  return 2*b;
}

Modified code

Below is the example code after modification.

void main() {
  int result=multi(b: 3);
  print(result);
}
int multi({required int b}){
  return 2*b;
}

Output

6