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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

 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

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.

 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

3. Logical Operators

 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 result is true otherwise false 2<1 or 2<3True not Logical NOT Reverse the condition Not(5>4)False

4. Assignment Operator

 Operator Operator Name Description Example = Assignment It assigns value from right side operand to left side operand I = 40 It assigns 40 to I += Add then assign It performs addition and then result is assigned to left hand operand I+=J that meansI = I + J -= Subtract then assign It performs subtraction and then result is assigned to left hand operand I-=J that meansI = I – J *= Multiply the assign It performs multiplication and then result is assigned to left hand operand. I*=J that meansI = I * J /= Divide then assign It performs division and then result is assigned to left hand operand I/=J that meansI = I / J %= Modulus then assign It performs modulus and then result is assigned to left hand operand I%=Jthat meansI = I % J <<= Left shift AND assignment operator It performs Binary left shift and then result 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 result 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

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

 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 bit are same then 0 otherwise 1 I ^ J0001 1110 ~ Binary Complement If bit is 1 the make it 0 and if 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 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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