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9) Operators
Java Operators
Operator is a special symbol that tells the compiler to perform specific mathematical or logical Operation. We can divide all the Java operators into the following groups:
Arithmetic Operators
Relational Operators
Logical Operators
Assignment Operators
Ternary or Conditional Operators
Arithmetic Operators
Given table shows the entire Arithmetic operator supported by Java Language. Let's suppose variable A hold 8 and B hold 3.
Operator
Example (int A=8, B=3)
Result
+
A+B
11
-
A-B
5
*
A*B
24
/
A/B
2
%
A%8
0
Relational Operators
Which can be used to check the Condition, it always returns true or false. Let’s suppose variable A hold 8 and B hold 3.
Operators
Example (int A=8, B=3)
Result
<
A<B
False
<=
A<=B
True
>
A>B
True
>=
A>=B
False
==
A==B
False
!=
A!=B
True
Logical Operator
Which can be used to combine more than one Condition? Suppose you want to combined two conditions A<B and B>C, then you need to use Logical Operator like (A<B) && (B>C). Here && is Logical Operator.
Operator
Example (int A=8, B=3, C=-10)
Result
&&
(A<B) &&(B>C)
False
||
(B!=-C) || (A==B)
True
!
!(B<=-A)
True
Truth table of Logical Operator
C1
C2
C1 && C2
C1|| C2
!C1
!C2
T
T
T
T
F
F
T
F
F
T
F
T
F
T
F
T
T
F
F
F
F
F
T
T
Assignment operators
This can be used to assign a value to a variable. Lets suppose variable A hold 8 and B hold 3.
Operator
Example (int A=8, B=3)
Result
+=
A+=B or A=A+B
11
-=
A-=3 or A=A-3
5
*=
A*=7 or A=A*7
56
/=
A/=B or A=A/B
2
%=
A%=5 or A=A%5
3
=
A=B
Value of B will be assigned to A
Ternary operator
If any operator is used on three operands or variable is known as ternary operator. It can be represented with " ?: "
Syntax
result = testCondition ? value1 : value2
this statement can be read as “If testCondition is true, assign the value of value1 to result; otherwise, assign the value of value2 to result.
Example:
1
int a=6,b=7;
2
int minVal = (a < b) ? a : b;
3
System.out.println(minVal);
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Output: 6