Single line variable declaration in apex

 Declare multiple similar data type of variables in one line. so save line of cod and readability. 

One line var declaration apex

// variable declaration
String firstName;
String lastName;
String middleName;

// now in single line variable declaration
String firstName, lastName, middleName;

// also assign values to it 
String firstName ='tech', lastName ='shorts', middleName = '.net';