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To print char or String variables, we can use the System.out.println() method.
System.out.println(first_name+” “+ middle_name+” “+last_name);
The output from the statement given above is:
Mayank M Saxena
Note the use of the + operator. In Java, when used with numbers as operands, the + operator adds the numbers. When
used with Strings as operands, the + operator concatenates the strings together. Also, note that the single space String
literal (“ “) is used so as to print a gap between the first and middle name and middle and last name.
3.3 oPEratorS
Operators are special symbols that execute specific operations in a programming language. The operators * and / have
already been observed. Java provides many types of operators some of them are:
Ð ÐArithmetic operators
Ð ÐRelational operators
Ð ÐAssignment operators
Ð ÐLogical operators
3.3.1 Arithmetic Operators
An arithmetic operator is used for writing codes that perform arithmetical calculations. The assignment operators are
discussed in the table given below:
Example (int a = 20,
Operator Description Explanation Result
b = 30)
Returns the sum of values of
+ Addition a+b 50
operands
Returns the difference of values of
- Subtraction a-b -10
operands
Returns the product of values of
* Multiplication a*b 600
operands
Returns the quotient of division of
/ Division b/a 1
values of operands
Returns the remainder of division of
% Modulus a%b 10
values of operands
++ Increment Increments the operand by 1 a++ Or ++a 21
-- Decrement Decrements the operand by 1 a-- Or --a 29
3.3.2 Relational Operators
A relational operator is used to compare two variables or expressions and result in true or false. There are six types of
relational operators. They are as follows:
Operator Description Explanation Example Result
Returns true if values of a and b are
== Equal to a==b false
equal, false otherwise
Returns true if values of a and b are
!= Not equal to a!=b true
not equal, false otherwise
Fundamentals of Java Programming 231

