Multiplication table :
num =int(input("Enter the number: "))
print("multiplication Table of", num)
for i in range(1,11):
        print (num,"x",i, "= ",num*i )
Output :
Enter the number : 6
Multiplication Table of 6
6 x 1 = 6
6 x 2 = 12
6 x 3 = 18
6 x 4 = 24
6 x 5 = 30
6 x 6 = 36
6 x 7 = 42
6 x 8 = 48
6 x 9 = 54
6 x 10 = 60.

for i in range (100, 1000):
     if a%2==1:
              print b
Output :
101,103,105,107,...........,997,999

Nested if..elif..else statement :
(i) When we need to construct a chain of if statement(s) then 'elif' clause can be used instead of 'if else'.
(ii) Syntax:
if < condition - 1>:
      statements-block 1
elif < condition - 2>:
       statements-block 2
else:
       statements-block n
(iii) In the syntax of if..elif ..else mentioned above, condition -1 is tested if it is true then statements-block 1 is executed, otherwise, the control checks condition-2, if it is true statements-block 2 is executed and even if it fails statements-block n mentioned in else part is executed.

(iv) 'elif' clause combines if..else-if ..else statements to one if..elif ... else. 'elif' can be considered to be abbreviation of 'else if'. In an 'if' statement there is no limit of 'elif' clause that can be used, but an 'else' clause if used should be placed at the end.
(v) Example: # Program to illustrate the use of nested if statement

m1 = int (input("Enter mark in first subject:"))
m2 = int (input("Enter mark in second subject:"))
avg = (m1+m2)/2
if avg > =80:
   print ("Grade : A")
elif avg > =70 and avg < 80:
   print ("Grade : B")
elif avg > =60 and avg < 70:
   print ("Grade : C")
elif avg > =50 and avg < 60:
   print ("Gradec: D")
else:
   print("Grade : E")
Output 1:
Enter mark in first subject : 34
Enter mark in second subject : 78
Grade : D
Output 2:
Enter mark in first Subject : 67
Enter mark in  second subject : 73
Grade: B

(i) for loop : The for loop usually known as a definite loop, because the programmer knows exactly how many times the loop will be executed.
(ii) Syntax:
for counter_variable in sequence:
     statements - block 1
[else: # optional block
     statements - block 2]
(iii) The for ... in statement is a looping statement used in Python to iterate over a sequence of objects, i.e., it goes through each item in a sequence. Here the sequence is the collection of ordered or unordered values or even a string.
(iv) range (): The range() is a built-in function,to generate series of values between two numeric intervals
(iv) The syntax of range() follows :
range (start, stop, [step])
Where,
start - refers to the initial value
stop - refers to the final values
step - refers to increment value, this is optional part.
Examples for range( ):
range (1,30,1) - will start the range of values from 1 and end at 29
range (2,30,2) - will start the range of values from 2 and end at 28
range (30,3,-3) - will start the range of values from 30 and end at 6.
range (20) - will consider this value 20 as the end value and starts the range count from 0 to 19 

Example :
# Program to illustrate the use of for loop - to print single digit even number 
for i in range (2,10,2):
       print (i, end=' ')
Output :
2 4 6 8