Python Tutorial for Beginners 3 Basic Math, Mathematical Operators and Python Expressions

In this Video I am going to show How to Use Basic Math, Mathematical Operators and Python Expressions In python.
So what is an expression ? An expression is A data value or set of operations to compute a value.
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Arithmetic operators we will use:
+ - * / addition, subtraction/negation, multiplication, division
% modulus, a.k.a. remainder
** exponentiation
precedence: Order in which operations are computed.

Mathematical Operators
Here are some commonly used mathematical operators

Syntax Math Operation Name
a+b {\displaystyle a+b\,} a+b\, addition
a-b {\displaystyle a-b\,} a-b\, subtraction
a*b {\displaystyle a\times b\,} a\times b\, multiplication
a/b {\displaystyle a\div b\,} a\div b\, division (see note below)
a//b {\displaystyle \lfloor a\div b\,\rfloor } \lfloor a\div b\,\rfloor floor division (e.g. 5//2=2) - Available in Python 2.2 and later
a%b {\displaystyle a~{\bmod {~}}b\,} a~{\bmod ~}b\, modulo
-a {\displaystyle -a\,} -a\, negation
abs(a) {\displaystyle |a|\,} |a|\, absolute value
a**b {\displaystyle a^{b}\,} a^{b}\, exponent

Order of Operations (Python Operator Precedence)
Highest precedence at top, lowest at bottom.Operators in the same box evaluate left to right..

Name Syntax PEMDAS Mnemonic
Parentheses ( ... ) Please
Exponents ** Excuse
Multiplication
and Division * , / , // , % My Dear
Addition
and Subtraction + , - Aunt Sally


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