This document contains summaries of 10 Python programs related to practical computational science problems: 1) A program to check if a number is prime or not. 2) A program to calculate the sum of a geometric progression. 3) A program to generate the Fibonacci series. 4) A program to calculate the mean of numbers entered by a user. 5) A program to generate Pascal's triangle. 6) A program to calculate the sum of squares of digits of a number. 7) A bubblesort program to sort a list of numbers. 8) A program to generate a number pattern based on user input. 9) A program to separate positive and negative numbers in a

1. PRACTICAL FILE(COMP SC.)

2. Index
PRACTICAL FILE PROGRAMS
1. To check if a number is prime or not
2.Sum of a geometric progression
3.Fibonacci series
4.Mean of numbers entered by user
5.Pascal’s Triangle
6. Sum of Squares of digits of a number
7. Bubblesort
8.Number pattern(user input based)
9.Checking positive and negatives in a list
10. To check if a given number is a palindrome or not

3. 1. To check if a number is prime or not
 def divisible(x):
mid=x//2 # integer division of mid=x//2
for i in range(2,mid+1):
if x%i==0:
return "Not a prime number"
else:
return "It is a prime number"
num=int(input("Enter number:"))
print(divisible(num)) Output of the code

4. 2.Sum of a geometric progression(infinite G.P)
 # 1 + x + x2+ x3....x n
x=int(input("Enter number:"))
n=int(input("Enter power(n)"))
s=0
for n in range(0,n+1):
term=x**n
s+=term
print("Sum of first",n+1, "terms is",s)
Output of the code

5. 3. Fibonacci Series
 n=int(input("Enter number of terms of Fibonacci series:"))
first=0 #0,1,1,2,3,5,8
second=1
print(first, second,end=" ")
for i in range(1,n-1):
third=first+second
print(third,end=" ")
first,second=second,third Output of
the code

6. 4.Function for mean of numbers entered by user
 def mymean(y):
s=0
for i in range(0,len(y)):
s+=y[i]
average_of_num=s/len(y)
return average_of_num
l=[]
while True:
num=float(input("Enter number: "))
l.append(num)
var=input("Do you want to continue y/n: ")
if var.upper() in "N":
break
print("Your personalized list of numbers: ", l)
print(mymean(l))
#the program creates a
personalized list of
numbers and displays
their mean
Output of the code

7. 5.Pascal’s Triangle
j=10
for i in range (0,11):
print(" "*j,end="") # keep cursor on the same line
s=str(11**i)
for k in range(0,len(s)):
print(s[k]," ",end="")
print()
j=j-1
Output of the code

8. 6.Sum of square of the digits of a number
num=int(input("Enter a number:"))
s=0
temp=num
while temp>0:
digit=temp%10 # extract a digit
temp//=10
s+=digit**2
print(s, "is the sum of the square of the digits of the
number")
Output of the code

9. 7.Bubblesort
def bubblesort(li):
print("unsorted list",li)
t=0
for i in range(0,len(li)):
for j in range(0,len(li)):
if li[j]>li[i]:
t=li[i]
li[i]=li[j]
li[j]=t
print("sorted list",li)
l=[6,8,90,78,764,765,766]
bubblesort(l)
Output of the code

10. 8.Number pattern(user input based)
n=int(input("Number of rows needed"))
for i in range(n):# number of rows
for j in range(i+1):# number of columns
print(j+1,end=" ")
print()# leave line after first iteration
Output of the code

11. 9.Checking positive and negative numbers in a
list
l=[2,3,4,5,6,7,-1,-2,-3,-4,-5,6,4] # Given list
list1=[]
list2=[]
for i in range(0,len(l)):
if l[i]>0:
list1.append(l[i])
if l[i]<0:
list2.append(l[i])
print(l)
print("Positive numbers are", list1)
print("negative numbers are=",list2)

12. 10. To check if the given number is a
palindrome
n=int(input("Enter a number: "))
rev=0
temp=n
while temp>0:
r=temp%10
temp//=10
rev=rev*10+r
if rev==n:
print("Number is a palindrome")
else:
print("It is not a palindrome")
Output of the
code