Introduction to Scala Operators
Operators are the symbols that perform the operation on some values. These values are known as operands. Scala has following operators –
- Arithmetic Operators
- Relational Operators
- Logical Operators
- Assignment Operators
- Bitwise Operators
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Arithmetic Operators
Operator |
Operator Name |
Description |
Example |
+ |
Addition |
Adds two operands |
I = 40, J= 20I + J = 60 |
– |
Subtraction |
Subtracts second operand from the first |
I = 40, J= 20I – J = 20 |
* |
Multiplication |
Multiplies both operands |
I = 40, J= 20I * J = 800 |
/ |
Divide |
Perform division operation |
I = 40, J= 20I / J = 2 |
% |
Modulus |
Return the remainder after Division |
I = 40, J= 20I % J = 0 |
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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.
Operator |
Operator Name |
Description |
Example |
== |
Equal to |
If the values of two operands are equal then then it returns true. |
I = 20, J = 20(I == J) is true |
!= |
Not Equal to |
If the values of two operands are not equal then it returns true. |
I = 20, J = 20(I == J) is False |
< |
Less than |
If the value of left operand is less than the value of right operand then it returns true |
I = 40, J = 20(I < J) is False |
> |
Greater than |
If the value of left operand is greater than the value of right operand then it returns true |
I = 40, J = 20(I > J) is True |
<= |
Less than or equal to |
If 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 to |
If 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 |
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Logical Operators
Assignment Operator
Operator |
Operator Name |
Description |
Example |
and |
Logical AND |
When Both side condition is true the result is true otherwise false |
2<1 and 2<3False |
or |
Logical OR |
When at least one condition is true then the result is true otherwise false |
2<1 or 2<3True |
not |
Logical NOT |
Reverse the condition |
Not(5>4)False |
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Assignment Operator
Operator |
Operator Name |
Description |
Example |
= |
Assignment |
It assigns a value from right side operand to left side operand |
I = 40 It assigns 40 to I |
+= |
Add then assign |
It performs addition and then results is assigned to left-hand operand |
I+=J that meansI = I + J |
-= |
Subtract then assign |
It performs subtraction and then results is assigned to left-hand operand |
I-=J that meansI = I – J |
*= |
Multiply the assign |
It performs multiplication and then results are assigned to the left-hand operand. |
I*=J that meansI = I * J |
/= |
Divide then assign |
It performs division and then results is assigned to left-hand operand |
I/=J that meansI = I / J |
%= |
Modulus then assign |
It performs modulus and then results is assigned to left-hand operand |
I%=Jthat meansI = I % J |
<<= |
Left shift AND assignment operator |
It performs Binary left shift and then results is assigned to left-hand operand |
I<<=5 that means
I = I << 5 |
>>= |
Right shift AND assignment operator |
It performs Binary right shift and then results is assigned to left-hand operand |
I>>=5 that means
I = I >>=5 |
&= |
Bitwise AND assignment operator |
It performs bitwise AND and then result is assigned to left-hand operand |
I &= 5 that meansI = I & 5 |
^= |
bitwise exclusive OR and assignment operator |
It performs bitwise exclusive OR and then result is assigned to left-hand operand |
I ^= 5 that meansI = I ^ 5 |
|= |
bitwise inclusive OR and assignment operator |
It performs bitwise inclusive OR and then result is assigned to left-hand operand |
I |= 5 that meansI = I | 5 |
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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
Operator |
Operator Name |
Description |
Example |
& |
Binary AND |
If both bits are 1 then 1 otherwise 0 |
I & J0000 0000 |
| |
Binary OR |
If one of the bit is 1 then 1 otherwise 0 |
I | J0001 1110 |
^ |
Binary XOR |
If both bits are same then 0 otherwise 1 |
I ^ J0001 1110 |
~ |
Binary Complement |
If the bit is 1 the make it 0 and if a bit is 0 the make it 1 |
~I1111 0101 |
<< |
Binary Left Shift |
The 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 Shift |
The 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 operator |
Left operands are shifted right by the no. of bits specified by the right operand and shifted values are filled up with 0. |
I >>>2 will give 15 i.e. 0000 1111 |

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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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