Program:
n = {5,-8, 6, 8, -4, 3, 1}
negative = 0
for i in n:
if {n < 0)
negative + = (i,)
print (negative)

remove ( ):
(i) The remove( ) function can also be used to delete one or more elements if the index value is not known.
(ii) Syntax:
List.remove(element) # to delete a particular element
(iii) Example:
> > > MyList= [12,89,34,'Kannan', 'Gowri sankar', 'Lenin']
> > > print(MyList)
[12, 89, 34, 'Karman', 'Gowrisankar', 'Lenin')
> > > MyList.remove(89)
> > > print(MyList)
[12, 34, 'Karman', 'Gowrisankar', 'Lenin']
pop ():
(i) pop() function can also be used to delete an element using the given index value. pope ) function deletes and returns the last element of a list if the index is not given.
(ii) pop() function is used to delete a particular element using its index value, as soon as the element is deleted.
(iii) The pop( ) function shows the element which is deleted. pope ) function is used to delete only one element from a list. Remember that, del statement deletes multiple elements.
(iv) Syntax: List.pop(index of an element)
(v) Example:
> > > MyList.pop(1)
34
> > > print(MyList)
[12, 'Kannan', 'Gowrisankar', 'Lenin')
clear ():
(i) The function clear( ) is used to delete all the elements in list, it deletes only the elements and retains the list
(ii) clear() function removes only the elements and retains the list. When you try to print the list which is already cleared, an empty square bracket is displayed without any elements, which means the list is empty.
(iii) Syntax:
List.clear( )
Example:
> > > MyList.clear( )
> > > print(MyList)
[ ]

(i) In Python, 'for loop' is used to access all the elements in a list one by one. This is just like the for keyword in other programming language such as C++.
(ii) Syntax:
for index_var in list:
print (index_var)
(iii) Here, dex_var represents the index value of each element in the list. Python reads this "for" statement like English: "For (every) element in (the list of) list and print (the name of the) list items"
(iv) Example:
Marks=[23,45, 67, 78,98]
for x in Marks:
print(x)
Output:
23
45
67
78
98
(v) In the above example, Marks list has 5 elements; each element is indexed from 0 to 4.
(vi) The Python reads the for loop and print statements like English: "For (every) element (represented as (x) in (the list of) Marks and print (the values of the) elements.

Program:
pi = 3.14
def Circle(r):
return (pi*r*r, 2*pi*r)
radius = float(input("Enter the Radius: "))
(area, circum) = Circle(radius)
print ("Area of the circle = ", area)
print ("Circumference of the circle = ", circum)
Output:
Enter the Radius: 5
Area of the circle = 78.5
Circumference of the circle = 31.400000000000002

Program:
marks=[]
subjects=['Tamil', 'English', 'Physics', 'Chemistry', 'Comp.Science', 'Maths']
for i in range(6):
m=int(input("Enter Mark ="))
marks.append(m)
for j in range(len(marks)):
print(" { }. { }Mark = { } ".format(j1+,subjects [j],marks [j]))
print("Total Marks = ", sum(marks))
Output:
Enter Mark = 45
Enter Mark = 98
Enter Mark = 76
Enter Mark = 28
Enter Mark = 46
Enter Mark = 15
1. Tamil Mark =45
2. English Mark = 98
3. Physics Mark = 76
4. Chemistry Mark = 28
5. Compo Science Mark =46
6. Maths Mark = 15
Total Marks = 308