Question

How to use optional parameters in function with Dart

Answer 1

f(String name, [String mode = "w+", String charset = 'utf-16']) {
    print(name);
    print(mode);
    print(charset);
    print("\n");
}


main() {
    f('dart');
    f('java', 'y+');
    f('c', 'windows-1258');
    f('python', 'z+', 'utf-8');
}





/*
run:

dart
w+
utf-16


java
y+
utf-16


c
windows-1258
utf-16


python
z+
utf-8

*/

 

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