Page 179 - Computer Science V2.0 Class 11

Operator Operation Explanation Examples
-= Subtraction and The operator subtracts the value on the RHS >>> b -= 2
assignment of the operator from the value on the LHS >>> b
of the operator and assigns the result to the 3
operand on the LHS of the operator. Note >>> c -= 8 // 4
that the expression on the RHS is evaluated >>> c
before applying -= -4

-= Multiplication and The operator multiplies the value on the LHS >>> b *= 3
assignment of the operator by the value on the RHS of >>> b
the operator and assigns the result to the 15
operand on the LHS of the operator. Note >>> c *= 5 + 3
that the expression on the RHS is evaluated
>>> c
before applying *=
-16
/= Division and The operator divides the value on the LHS of >>> a /= 4
assignment the operator by the value on the RHS of the >>> a
operator and assigns the quotient (float) to 2.5
the operand on the LHS of the operator. Note >>> a /= 2 + 3
that the expression on the RHS is evaluated
>>> a
before applying /=
2.0
%= Modulus and The operator divides the value on the LHS of >>> a %= 3
assignment the operator by the value on the RHS of the >>> a
operator and assigns the remainder to the 1
operand on its left. Note that the expression >>> a %= 2 + 4
on the RHS is evaluated before applying %= >>> a
4
//= Integer division and The operator divides the value on the LHS of >>> a //= 3
assignment the operator by the value on the RHS of the >>> a
operator and assigns the quotient (int) to 3
the operand on the LHS of the operator. Note >>> c //= 2
that the expression on the RHS is evaluated >>> c
before applying //= -1

>>> a //= 1 + 3
>>> a
2
**= Exponentiation and The operator computes (operand on the LHS >>> b **= 3
assignment of **=)** (operand on the RHS of **=) and >>> b
assigns the result to the operand on the LHS 125
of the operator. Note that the expression on >>> c **= 2 * 3
the RHS is evaluated before applying **=. >>> c
64
7.5.4 Logical Operators
A logical value is True or False. The logical operators yield True or False, depending upon the value of logical
operands on either side. A value other than 0 and None evaluates to True while zero evaluates to False. Therefore,
1, "bb", and -1 are interpreted as True but 0 and None are interpreted as False. There are three logical
operators: and, or, and not. Note that all three operators are keywords and are used in lowercase only. Further,
in an expression, the precedence of the operators in decreasing order is: not, and, or. These operators may be
used to express relationships between relational expressions. For detailed description of these operators, see Table
7.4: Logical Operators.

Data Types and Operators 165