VietMX Staff asked 3 years ago
Required Parameters
Dart required parameters are the arguments that are passed to a function and the function or method required all those parameters to complete its code block.
findVolume(int length, int breath, int height) {
print('length = $length, breath = $breath, height = $height');
}
findVolume(10,20,30);Optional Parameters
- Optional parameters are defined at the end of the parameter list, after any required parameters.
- In Flutter/Dart, there are 3 types of optional parameters: – Named – Parameters wrapped by
{ }– eg.getUrl(int color, [int favNum])– Positional – Parameters wrapped by[ ]) – eg.getUrl(int color, {int favNum})– Default – Assigning a default value to a parameter. – eg.getUrl(int color, [int favNum = 6])
