How to fix Dart Lang Error: RangeError (index): Index out of range: no indices are valid: 0

In C like languages like JS, its a common operation to assign a value to an array in a for loop at a given index using []. Like this:

With Dart lang trying this:

You get the error: RangeError (index): Index out of range: no indices are valid: 0

The solution is to use List's insert method .insert(i, value) or .add(value).