Operators are special symbols that represent computations like addition and multiplication. The values the operator is applied to are called operands.

**Operators and operands**

**Operators** are special symbols that
represent computations like addition and multiplication. The values the
operator is applied to are called **operands**.

The
operators +, -, *, / and ** perform addition, subtraction, multiplication,
division and exponentiation.

Eg:

20+32

hour-1

hour*60+minute

minute/60

5**2
(5+9)*(15-7)

The order
of evaluation depends on the **rules of
precedence**. The acronym **PEMDAS**
is a useful way to remember the rules:

·
Parentheses
have the highest precedence

·
Exponentiation
has the next highest precedence, so 2**1+1 is 3, not 4, and 3*1**3 is
3, not 27.

·
Multiplication
and Division have the same precedence, which is higher than Addition and Subtraction,
which also have the same precedence. So 2*3-1 is 5, not 4, and 6+4/2 is 8, not
5.

·
Operators with
the same precedence are evaluated from left to right.

Tags : Python Programming , Problem Solving and Python Programming : Data, Expressions, Statements

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