Basic fundamentals of Python part 2

Python keywords :-

• Python has 33 keywords that are given below.
• All keyword in lowercase except(False,None&True)

Note ->

• keyword is not used as identifier name in the application.

Comments,Indentation and Multi-lining:-

• Comments begin with #

Eg. #sum of two numbers

          p=a+b

           OR

          q=a+b  #sum of two numbers

• Multi-line comments should be written in a pair of ''' or """

Eg.

''' Name = Ram

  Age = 30

  Education= B.Tech

  Occupation=Student'''

              OR

Eg.

"""Name = sita

    Age = 20

    Education= B.Tech

    Occupation=Student"""

• In python,Indentation is more important. You have to use it very carefully.Don't use it casually.Following code will be reported as error.

Eg.
a=10
b=5
  c=a+b

• Following python code will be correct manner as given below:-

Eg.

a=5
b=10
c=a+b

• We can use \ (backslash) in python codes ,when we want to write multi-line with each line except the last ending with a \  .

Total_marks = Physics+Math+English+\
              History+Economy +\
              Chemistry+Hindi+Civics+\
              biology

• If we are using following brackets [ ] , { }and ( ). we don't need \ (backslash) as shown below.

Eg. 

Total_marks =[Physics+Math+English+ 

               History+Economy + 
               Chemistry+Hindi+Civics+ 
               biology]

• In python programming ,there is no need to define type of a variable .

Eg.

a=5

b=20

c=a=b

print(c)

• Simple Variable declaration and assignment in python language.

Eg.

a=12

b=17

name='Ram'

• Multiple Variable assignment:- We can use multiple variable assignment in python.We can use ; as statement separation.

Eg.

a=10;b=30;c=40;name='Ram'

              OR

a,b,c,name=10,30,40,'Ram'

#If more variable has same value:

p=q=r=20

Python Types:-
There are some built-in types of python as given below:-

• Basic Types:- int,float,complex,bool,bytes,string .
• Container types:- list,tuple,set,dict
• User-defined :- class
• Numbers:-

int -> 156(decimal),0432 (octal),0x4A3(hexadecimal)  

float -> 314.1528(decimal),3.141528e2 (octal), 3.141528E2(hexadecimal) 

complex -> 5+4j , 3+10j # contains real and imaginary part

Watch Lecture 5 Complete Video:-