How to save operators in Dart

Question

I want to do something like this in dart.

var z = +

and then put it in another var like this

var x = 5 z 5

And when I did this

var z = +

I get an Error

Expected an identifier.

Answer 1

you can not make variable operators in dart though what you can do is to create a custom variable for the same by doing:

void main() {
var operators = {
    '+': (a, b) { return a + b; },
    '<': (a, b) { return a < b; },
     // ...
};

var op = '+';
var x = operators[op]!(10, 20);
  print(x);
}