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Introduction to Scala Operaors

Operators are the symbols which perform the operation on the some values. These values are known as operands. Scala have following operators –

  • Arithmetic Operators
  • Relational Operators
  • Logical Operators
  • Assignment Operators
  • Bitwise Operators

 

1. Arithmetic Operators

OperatorOperator NameDescriptionExample
+AdditionAdds two operandsI = 40, J= 20I + J = 60
SubtractionSubtracts second operand from the firstI = 40, J= 20I – J = 20
*MultiplicationMultiplies both operandsI = 40, J= 20I * J = 800
/DividePerform division operationI = 40, J= 20I / J = 2
%ModulusReturn the remainder after DivisionI = 40, J= 20I % J = 0

 

2. Relational Operators

It is also known as comparison operator because it compares the values. After comparison it returns the Boolean value i.e. either true or false.

OperatorOperator NameDescriptionExample
==Equal toIf the values of two operands are equal then then it returns true.I = 20, J = 20(I == J) is true
!= Not Equal toIf the values of two operands are not equal then it returns true.I = 20, J = 20(I == J) is False
<Less thanIf the value of left operand is less than the value of right operand then it returns trueI = 40, J = 20(I < J) is False
>Greater thanIf the value of left operand is greater than the value of right operand then it returns trueI = 40, J = 20(I > J) is True
<=Less than or equal toIf the value of left operand is less than or equal to the value of right operand then it returns true.I = 40, J = 20(I <= J) is False
>=Greater than or equal toIf the value of left operand is greater than or equal to the value of right operand then it returns true.I = 40, J = 20(I >= J) is True

 

3. Logical Operators

OperatorOperator NameDescriptionExample
andLogical ANDWhen Both side condition is true the result is true otherwise false2<1 and 2<3False
orLogical ORWhen at least one condition is true then result is true otherwise false2<1 or 2<3True
notLogical NOTReverse the conditionNot(5>4)False

 

4. Assignment Operator

OperatorOperator NameDescriptionExample
=AssignmentIt assigns value from right side operand to left side operandI = 40 It assigns 40 to I
+=Add then assignIt performs addition and then result is assigned to left hand operandI+=J that meansI = I + J
-=Subtract then assignIt performs subtraction and then result is assigned to left hand operandI-=J that meansI = I – J
*=Multiply the assignIt performs multiplication and then result is assigned to left hand operand.I*=J that meansI = I * J
/=Divide then assignIt performs division and then result is assigned to left hand operandI/=J that meansI = I / J
%=Modulus then assignIt performs modulus and then result is assigned to left hand operandI%=Jthat meansI = I % J
<<=Left shift AND assignment operatorIt performs Binary left shift and then result is assigned to left hand operandI<<=5 that means
I = I << 5
>>=Right shift AND assignment operatorIt performs Binary right shift and then result is assigned to left hand operandI>>=5 that means
I = I >>=5
&=Bitwise AND assignment operatorIt performs bitwise AND and then result is assigned to left hand operandI &= 5 that meansI = I & 5
^=bitwise exclusive OR and assignment operatorIt performs bitwise exclusive OR and then result is assigned to left hand operandI ^= 5 that meansI = I ^ 5
|=bitwise inclusive OR and assignment operatorIt performs bitwise inclusive OR and then result is assigned to left hand operandI |= 5 that meansI = I | 5

 

5. Bitwise Operators

It performs bit by bit operation. Suppose there are two variable I = 10 and J = 20 and their binary values are

I = 10 = 0000 1010

J = 20 = 0001 0100

OperatorOperator NameDescriptionExample
&Binary ANDIf both bits are 1 then 1 otherwise 0 I & J0000 0000
|Binary ORIf one of the bit is 1 then 1 otherwise 0I | J0001 1110
^Binary XORIf both bit are same then 0 otherwise 1I ^ J0001 1110
~Binary ComplementIf bit is 1 the make it 0 and if bit is 0 the make it 1~I1111 0101
<<Binary Left ShiftThe left operand is moved left by the number of bits specified by the right operand.I << 2 will give 240 i.e. 1111 0000
>>Binary Right ShiftThe left operand is moved right by the number of bits specified by the right operand.I >> 2 will give 15 i.e. 1111
>>>Shift right zero fill operatorLeft operands are shifted right by the no. of bits specified by right operand and shifted values are filled up with 0.I >>>2 will give 15  i.e. 0000 1111

 

Operator Precedence

Category Operator Associativity 
Postfix() []Left to right
Unary! ~Right to left
Multiplicative* / %Left to right
Additive+ –Left to right
Shift>> >>> <<Left to right
Relational> >= < <=Left to right
Equality== !=Left to right
Bitwise AND&Left to right
Bitwise XOR^Left to right
Bitwise OR|Left to right
Logical AND&&Left to right
Logical OR||Left to right
Assignment= += -= *= /= %= >>= <<= &= ^= |=Right to left
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