1.dart list
// A list literal.
var lostNumbers = [4, 8, 15, 16, 23, 42];
// A map literal.
var nobleGases = {
'He': 'Helium',
'Ne': 'Neon',
'Ar': 'Argon',
};
// A set literal.
var frogs = {
'Tree',
'Poison dart',
'Glass',
};
main() {
print(lostNumbers.last);
print(nobleGases['Ne']);
print(frogs.difference({'Poison dart'}));
}