To understand a programming language deeply, you need to practice what you’ve learned. If you’ve completed learning the syntax of Python programming language, it is the right time to do some practice programs.

In this article, I’ll list down some problems that I’ve done and the answer code for each exercise. Analyze each problem and try to solve it by yourself. If you have any doubts, you can check the code that I’ve provided below. I’ve also attached the corresponding outputs.

## 1. Python program to check whether the given number is even or not.

```
number = input("Enter a number: ")
x = int(number)%2
if x == 0:
print("The number is Even.")
else:
print("The number is Odd.")
```

Output:

```
Enter a number: 7
The number is Odd.
```

```
Enter a number: 6
The number is Even.
```

## 2. Python program to convert the temperature in degree centigrade to Fahrenheit

```
c = input("Enter temperature in Centigrade: ")
f = (9*(int(c))/5)+32
print("Temperature in Fahrenheit is: ", f)
```

Output:

```
Enter temperature in Centigrade: 30
Temperature in Fahrenheit is: 86.0
```

## 3. Python program to find the area of a triangle whose sides are given

```
import math
a = float(input("Enter the length of side a: "))
b = float(input("Enter the length of side b: "))
c = float(input("Enter the length of side c: "))
s = (a+b+c)/2
area = math.sqrt(s*(s-a)*(s-b)*(s-c))
print("Area of the triangle is: ", area)
```

Output:

```
Enter the length of side a: 4.0
Enter the length of side b: 3.0
Enter the length of side c: 6.0
Area of the triangle is: 5.332682251925386
```

## 4. Python program to find out the average of a set of integers

```
count = int(input("Enter the count of numbers: "))
i = 0
sum = 0
for i in range(count):
x = int(input("Enter an integer: "))
sum = sum + x
avg = sum/count
print("The average is: ", avg)
```

Output:

```
Enter the count of numbers: 5
Enter an integer: 3
Enter an integer: 6
Enter an integer: 8
Enter an integer: 5
Enter an integer: 7
The average is: 5.8
```

## 5. Python program to find the product of a set of real numbers

```
i = 0
product = 1
count = int(input("Enter the number of real numbers: "))
for i in range(count):
x = float(input("Enter a real number: "))
product = product * x
print("The product of the numbers is: ", product)
```

Output:

```
Enter the number of real numbers: 4
Enter a real number: 3.2
Enter a real number: 2.9
Enter a real number: 7.4
Enter a real number: 5.5
The product of the numbers is: 377.69599999999997
```

## 6. Python program to find the circumference and area of a circle with a given radius

```
import math
r = float(input("Input the radius of the circle: "))
c = 2 * math.pi * r
area = math.pi * r * r
print("The circumference of the circle is: ", c)
print("The area of the circle is: ", area)
```

Output:

```
Input the radius of the circle: 4.3
The circumference of the circle is: 27.01769682087222
The area of the circle is: 58.088048164875275
```

## 7. Python program to check whether the given integer is a multiple of 5

```
number = int(input("Enter an integer: "))
if(number%5==0):
print(number, "is a multile of 5")
else:
print(number, "is not a multiple of 5")
```

Output:

```
Enter an integer: 23
23 is not a multiple of 5
```

```
Enter an integer: 55
55 is a multile of 5
```

## 8. Python program to check whether the given integer is a multiple of both 5 and 7

```
number = int(input("Enter an integer: "))
if((number%5==0)and(number%7==0)):
print(number, "is a multiple of both 5 and 7")
else:
print(number, "is not a multiple of both 5 and 7")
```

Output:

```
Enter an integer: 33
33 is not a multiple of both 5 and 7
```

```
Enter an integer: 35
35 is a multiple of both 5 and 7
```

## 9. Python program to find the average of 10 numbers using while loop

```
count = 0
sum = 0.0
while(count<10):
number = float(input("Enter a real number: "))
count=count+1
sum = sum+number
avg = sum/10
print("Average is :",avg)
```

Output:

```
Enter a real number: 2.3
Enter a real number: 3.3
Enter a real number: 1.7
Enter a real number: 4.1
Enter a real number: 1.65
Enter a real number: 7.32
Enter a real number: 6.66
Enter a real number: 4.53
Enter a real number: 9.01
Enter a real number: 2.15
Average is : 4.272
```

## 10. Python program to display the given integer in a reverse manner

```
number = int(input("Enter a positive integer: "))
rev = 0
while(number!=0):
digit = number%10
rev = (rev*10)+digit
number = number//10
print(rev)
```

Output:

```
Enter a positive integer: 739
937
```

## 11. Python program to find the geometric mean of n numbers

```
c = 0
p = 1.0
count = int(input("Enter the number of values: "))
while(c<count):
x = float(input("Enter a real number: "))
c = c+1
p = p * x
gm = pow(p,1.0/count)
print("The geometric mean is: ",gm)
```

Output:

```
Enter the number of values: 6
Enter a real number: 3.2
Enter a real number: 1.54
Enter a real number: 4.11
Enter a real number: 9.12
Enter a real number: 7.56
Enter a real number: 3.14
The geometric mean is: 4.045694954202098
```

## 12. Python program to find the sum of the digits of an integer using a while loop

```
sum = 0
number = int(input("Enter an integer: "))
while(number!=0):
digit = number%10
sum = sum+digit
number = number//10
print("Sum of digits is: ", sum)
```

Output:

```
Enter an integer: 395
Sum of digits is: 17
```

## 13. Python program to display all the multiples of 3 within the range 10 to 50

```
for i in range(10,50):
if (i%3==0):
print(i)
```

Output:

```
12
15
18
21
24
27
30
33
36
39
42
45
48
```

## 14. Python program to display all integers within the range 100-200 whose sum of digits is an even number

```
for i in range(100,200):
num = i
sum = 0
while(num!=0):
digit = num%10
sum = sum + digit
num = num//10
if(sum%2==0):
print(i)
```

Output:

```
101
103
105
107
109
110
112
114
116
118
121
123
125
127
129
130
132
134
136
138
141
143
145
147
149
150
152
154
156
158
161
163
165
167
169
170
172
174
176
178
181
183
185
187
189
190
192
194
196
198
```

## 15. Python program to check whether the given integer is a prime number or not

```
num = int(input("Enter an integer greater than 1: "))
isprime = 1 #assuming that num is prime
for i in range(2,num//2):
if (num%i==0):
isprime = 0
break
if(isprime==1):
print(num, "is a prime number")
else:
print(num, "is not a prime number")
```

Output:

```
Enter an integer greater than 1: 7
7 is a prime number
```

```
Enter an integer greater than 1: 24
24 is not a prime number
```

## 16. Python program to generate the prime numbers from 1 to N

```
num =int(input("Enter the range: "))
for n in range(2,num):
for i in range(2,n):
if(n%i==0):
break
else:
print(n)
```

Output:

```
Enter the range: 6
2
3
5
```

## 17. Python program to find the roots of a quadratic equation

```
import math
a = float(input("Enter the first coefficient: "))
b = float(input("Enter the second coefficient: "))
c = float(input("Enter the third coefficient: "))
if (a!=0.0):
d = (b*b)-(4*a*c)
if (d==0.0):
print("The roots are real and equal.")
r = -b/(2*a)
print("The roots are ", r,"and", r)
elif(d>0.0):
print("The roots are real and distinct.")
r1 = (-b+(math.sqrt(d)))/(2*a)
r2 = (-b-(math.sqrt(d)))/(2*a)
print("The root1 is: ", r1)
print("The root2 is: ", r2)
else:
print("The roots are imaginary.")
rp = -b/(2*a)
ip = math.sqrt(-d)/(2*a)
print("The root1 is: ", rp, "+ i",ip)
print("The root2 is: ", rp, "- i",ip)
else:
print("Not a quadratic equation.")
```

Output:

```
Enter the first coefficient: 4
Enter the second coefficient: 7
Enter the third coefficient: 2
The roots are real and distinct.
The root1 is: -0.3596117967977924
The root2 is: -1.3903882032022077
```

## 18. Python program to print the numbers from a given number n till 0 using recursion

```
def print_till_zero(n):
if (n==0):
return
print(n)
n=n-1
print_till_zero(n)
print_till_zero(8)
```

Output:

```
8
7
6
5
4
3
2
1
```

## 19. Python program to find the factorial of a number using recursion

```
def fact(n):
if n==1:
f=1
else:
f = n * fact(n-1)
return f
num = int(input("Enter an integer: "))
result = fact(num)
print("The factorial of", num, " is: ", result)
```

Output:

```
Enter an integer: 5
The factorial of 5 is: 120
```

## 20. Python program to display the sum of n numbers using a list

```
numbers = []
num = int(input('How many numbers: '))
for n in range(num):
x = int(input('Enter number '))
numbers.append(x)
print("Sum of numbers in the given list is :", sum(numbers))
```

Output:

```
How many numbers: 3
Enter number 2
Enter number 3
Enter number 4
Sum of numbers in the given list is : 9
```

## 21. Python program to implement linear search

```
numbers = [4,2,7,1,8,3,6]
f = 0 #flag
x = int(input("Enter the number to be found out: "))
for i in range(len(numbers)):
if (x==numbers[i]):
print("Successful search, the element is found at position", i)
f = 1
break
if(f==0):
print("Oops! Search unsuccessful")
```

Output:

```
Enter the number to be found out: 7
Successful search, the element is found at position 2
```

## 22. Python program to implement binary search

```
def binarySearch(numbers, low, high, x):
if (high >= low):
mid = low + (high - low)//2
if (numbers[mid] == x):
return mid
elif (numbers[mid] > x):
return binarySearch(numbers, low, mid-1, x)
else:
return binarySearch(numbers, mid+1, high, x)
else:
return -1
numbers = [ 1,4,6,7,12,17,25 ] #binary search requires sorted numbers
x = 7
result = binarySearch(numbers, 0, len(numbers)-1, x)
if (result != -1):
print("Search successful, element found at position ", result)
else:
print("The given element is not present in the array")
```

Output:

`Search successful, element found at position 3`

## 23. Python program to find the odd numbers in an array

```
numbers = [8,3,1,6,2,4,5,9]
count = 0
for i in range(len(numbers)):
if(numbers[i]%2!=0):
count = count+1
print("The number of odd numbers in the list are: ", count)
```

Output:

`The number of odd numbers in the list are: 4`

## 24. Python program to find the largest number in a list without using built-in functions

```
numbers = [3,8,1,7,2,9,5,4]
big = numbers[0]
position = 0
for i in range(len(numbers)):
if (numbers[i]>big):
big = numbers[i]
position = i
print("The largest element is ",big," which is found at position ",position)
```

Output:

`The largest element is 9 which is found at position 5`

## 25. Python program to insert a number to any position in a list

```
numbers = [3,4,1,9,6,2,8]
print(numbers)
x = int(input("Enter the number to be inserted: "))
y = int(input("Enter the position: "))
numbers.insert(y,x)
print(numbers)
```

Output:

```
[3, 4, 1, 9, 6, 2, 8]
Enter the number to be inserted: 11
Enter the position: 2
[3, 4, 11, 1, 9, 6, 2, 8]
```

## 26. Python program to delete an element from a list by index

```
numbers = [3,4,1,9,6,2,8]
print(numbers)
x = int(input("Enter the position of the element to be deleted: "))
numbers.pop(x)
print(numbers)
```

Output:

```
[3, 4, 1, 9, 6, 2, 8]
Enter the position of the element to be deleted: 4
[3, 4, 1, 9, 2, 8]
```

## 27. Python program to check whether a string is palindrome or not

```
def rev(inputString):
return inputString[::-1]
def isPalindrome(inputString):
reverseString = rev(inputString)
if (inputString == reverseString):
return True
return False
s = input("Enter a string: ")
result = isPalindrome(s)
if result == 1:
print("The string is palindrome")
else:
print("The string is not palindrome")
```

Output:

```
Enter a string: malayalam
The string is palindrome
```

```
Enter a string: car
The string is not palindrome
```

## 28. Python program to implement matrix addition

```
X = [[8,5,1],
[9 ,3,2],
[4 ,6,3]]
Y = [[8,5,3],
[9,5,7],
[9,4,1]]
result = [[0,0,0],
[0,0,0],
[0,0,0]]
for i in range(len(X)):
for j in range(len(X[0])):
result[i][j] = X[i][j] + Y[i][j]
for k in result:
print(k)
```

Output:

```
[16, 10, 4]
[18, 8, 9]
[13, 10, 4]
```

## 29. Python program to implement matrix multiplication

```
X = [[8,5,1],
[9 ,3,2],
[4 ,6,3]]
Y = [[8,5,3],
[9,5,7],
[9,4,1]]
result = [[0,0,0,0],
[0,0,0,0],
[0,0,0,0]]
for i in range(len(X)):
for j in range(len(Y[0])):
for k in range(len(Y)):
result[i][j] += X[i][k] * Y[k][j]
for x in result:
print(x)
```

Output:

```
[118, 69, 60, 0]
[117, 68, 50, 0]
[113, 62, 57, 0]
```

## 30. Python program to check leap year

```
year = int(input("Enter a year: "))
if (year % 4) == 0:
if (year % 100) == 0:
if (year % 400) == 0:
print(year, "is a leap year")
else:
print(year, "is not a leap year")
else:
print(year, "is a leap year")
else:
print(year, " is not a leap year")
```

Output:

```
Enter a year: 2023
2023 is not a leap year
```

```
Enter a year: 2024
2024 is a leap year
```

## 31. Python program to find the Nth term in a Fibonacci series using recursion

```
def Fib(n):
if n<0:
print("The input is incorrect.")
elif n==1:
return 0
elif n==2:
return 1
else:
return Fib(n-1)+Fib(n-2)
print(Fib(7))
```

Output:

`8`

## 32. Python program to print Fibonacci series using iteration

```
a = 0
b = 1
n=int(input("Enter the number of terms in the sequence: "))
print(a,b,end=" ")
while(n-2):
c=a+b
a,b = b,c
print(c,end=" ")
n=n-1
```

Output:

```
Enter the number of terms in the sequence: 8
0 1 1 2 3 5 8 13
```

## 33. Python program to print all the items in a dictionary

```
phone_book = {
'John' : [ '8592970000', 'john@xyzmail.com' ],
'Bob': [ '7994880000', 'bob@xyzmail.com' ],
'Tom' : [ '9749552647' , 'tom@xyzmail.com' ]
}
for k,v in phone_book.items():
print(k, ":", v)
```

Output:

```
John : ['8592970000', 'john@xyzmail.com']
Bob : ['7994880000', 'bob@xyzmail.com']
Tom : ['9749552647', 'tom@xyzmail.com']
```

## 34. Python program to implement a calculator to do basic operations

```
def add(x,y):
print(x+y)
def subtract(x,y):
print(x-y)
def multiply(x,y):
print(x*y)
def divide(x,y):
print(x/y)
print("Enter two numbers")
n1=input()
n2=input()
print("Enter the operation +,-,*,/ ")
op=input()
if op=='+':
add(int(n1),int(n2))
elif op=='-':
subtract(int(n1),int(n2))
elif op=='*':
multiply(int(n1),int(n2))
elif op=='/':
divide(int(n1),int(n2))
else:
print(" Invalid entry ")
```

Output:

```
5
6
Enter the operation +,-,*,/
*
30
```

## 35. Python program to draw a circle of squares using Turtle

```
import turtle
x=turtle.Turtle()
def square(angle):
x.forward(100)
x.right(angle)
x.forward(100)
x.right(angle)
x.forward(100)
x.right(angle)
x.forward(100)
x.right(angle+10)
for i in range(36):
square(90)
```

Output:

## Conclusion

For practicing more such exercises, I suggest you go to hackerrank.com and sign up. You’ll be able to practice Python there very effectively.

Once you become comfortable solving coding challenges, it’s time to move on and build something cool with your skills. If you know Python but haven’t built an app before, I suggest you check out my Create Desktop Apps Using Python & Tkinter course. This interactive course will walk you through from scratch to building clickable apps and games using Python.

I hope these exercises were helpful to you. If you have any doubts, feel free to let me know in the comments.

Happy coding.

I don’t mean to nitpick and I don’t want this published but you might want to check code for #16.

4 is not a prime number.

Thanks man for pointing out the mistake. I’ve updated the code.

# 8. Python program to check whether the given integer is a multiple of both 5 and 7:

You can only check if integer is a multiple of 35.

It always works the same – just multiply all the numbers you need to check for multiplicity.

For reverse the given integer

n=int(input(“enter the no:”))

n=str(n)

n=int(n[::-1])

print(n)

Very nice

very good, tnks

Please who can help me with this question asap

A particular cell phone plan includes 50 minutes of air time and 50 text messages for $15.00 a month. Each additional minute of air time costs $0.25, while additional text messages cost $0.15 each. All cell phone bills include an additional charge of $0.44 to support 911 call centers, and the entire bill (including the 911 charge) is subject to 5 percent sales tax.

We are so to run the code in phyton

this is best app

Hello Ashwin, Thanks for sharing a Python practice

May be in a better way for reverse.

#”’ Reverse of a string

v_str = str ( input(‘ Enter a valid string or number :- ‘) )

v_rev_str=”

for v_d in v_str:

v_rev_str = v_d + v_rev_str

print( ‘reverse of th input string / number :- ‘, v_str ,’is :- ‘, v_rev_str.capitalize() )

#Reverse of a string ”’

Problem 15. When searching for prime numbers, the maximum search range only needs to be sqrt(n). You needlessly continue the search up to //n. Additionally, you check all even numbers. As long as you declare 2 to be prime, the rest of the search can start at 3 and check every other number. Another big efficiency improvement.