What is the String Concatenation

+ Operator is employed to concatenate strings

- System.out.pritln ("Hello" + "World") will print Hello World on console

String concatenated with any other data type like int will also convert that datatype to String and result would be a concatenated String displayed on console. E.g.,

- int i  =  4;

- int j  =  5;

System.out.println ("Hello"  +  i)

will print Hello 4 on screen

- However

System.out.println( i+j) ;

will print 9 on the console because both i and j are of type int.