Concatenation is two text statement to concate to a sum type
Concatenation is used + symbol to marge to statement.
Multiline string:
A Multi line String is to store multi data in String
Ex:
void main() {
String Con_tring = '''
This is a fun
multi-line
string in
Dart.
''';
/*
Two ways to write
(''' is to write data''');
(""" is to write data """");
*/
print(Con_tring);
}