Python 3 Code Examples – Programming Code Examples
Python

Python 3 Code Examples15 min read

1 year ago
Add Comment
by admin

Python Programs for Practice

Welcome to our section dedicated to the Python programming language. You will find a set of information related to this language (course support, code examples, …).

Here is a small examples of python programming language.

How to Print “Hello World!” in Python




Python 3 Code:

1
2
3
4
5
 
# This program prints Hello, world!
 
print('Hello, world!')
 

Output:

How to Add Two Variables in Python

Python 3 Code:

1
2
3
4
5
6
7
8
9
 
# This program adds two numbers
num1 = 5.5
num2 = 1.15
# Add two numbers
sum = float(num1) + float(num2)
# Display the sum
print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))
 

Output:

How to  Find the Square Root in Python

Python 3 Code:

1
2
3
4
5
6
7
8
9
 
# Python Program to calculate the square root
 
 
#to take the input from the user
num = float(input('Enter a number: '))
num_sqrt = num ** 0.5
print('The square root of %0.3f is %0.3f'%(num ,num_sqrt))
 

Output:

How to Calculate the Area of a Triangle in Python

Python 3 Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
# Python Program to find the area of triangle
 
 
# to take inputs from the user
a = float(input('Enter first side: '))
b = float(input('Enter second side: '))
c = float(input('Enter third side: '))
 
# calculate the semi-perimeter
s = (a + b + c) / 2
 
# calculate the area
area = (s*(s-a)*(s-b)*(s-c)) ** 0.5
print('The area of the triangle is %0.2f' %area)
 

Output:

How to Calculate the Area of a Circle in Python

Code:

1
2
3
4
5
6
7
8
9
10
11
 
# Python program to find Area of a circle
  
def findArea(r):
    PI = 3.142
    return PI * (r*r);
  
# Driver method
num=float(input("Enter r value:"))
print("Area is %.6f" % findArea(num));
 

Output:

How to Solve Quadratic Equation in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
# Solve the quadratic equation ax**2 + bx + c = 0
 
# import complex math module
import cmath
 
 
# To take coefficient input from the users
a = float(input('Enter a: '))
b = float(input('Enter b: '))
c = float(input('Enter c: '))
 
# calculate the discriminant
d = (b**2) - (4*a*c)
 
# find two solutions
sol1 = (-b-cmath.sqrt(d))/(2*a)
sol2 = (-b+cmath.sqrt(d))/(2*a)
 
print('The solution are {0} and {1}'.format(sol1,sol2))
 

Output:

 

How to Swap Two Variables in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
# Python program to swap two variables
 
# To take input from the user
x = input('Enter value of x: ')
y = input('Enter value of y: ')
 
# create a temporary variable and swap the values
temp = x
x = y
y = temp
 
print('The value of x after swapping: {}'.format(x))
print('The value of y after swapping: {}'.format(y))
 

Output:

How to Generate a Random Number in Python

1
2
3
4
5
6
7
8
 
# Program to generate a random number between 0 and 100
 
# import the random module
import random
 
print(random.randint(0,100))
 

Output:




How to Convert Kilometers to Miles in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
 
kilometers = 10
 
# To take kilometers from the user
kilometers = float(input("Enter value in kilometers"))
 
# conversion factor
conv_fac = 0.621371
 
# calculate miles
miles = kilometers * conv_fac
print('%0.3f kilometers is equal to %0.3f miles' %(kilometers,miles))
 

How to Convert Celsius To Fahrenheit in Python

1
2
3
4
5
6
7
8
9
10
 
# Python Program to convert temperature in celsius to fahrenheit
 
# To take celsius from the user
celsius= float(input("Enter value in celsius"))
 
# calculate fahrenheit
fahrenheit = (celsius * 1.8) + 32
print('%0.1f degree Celsius is equal to %0.1f degree Fahrenheit' %(celsius,fahrenheit))
 

 

How to Find the Sum of Numbers in a List in Python

Example Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# Python 3 code to find sum  
# of elements in given array
def _sum(arr,n):
      
    # return sum using sum  
    # inbuilt sum() function
    return(sum(arr))
  
# driver function
arr=[]
# input values to list
arr = [120, 30, 24, 5]
  
# calculating length of array
n = len(arr)
  
ans = _sum(arr,n)
  
# display sum
print ('Sum of the array is ',ans)
 

Output:

How to to Check if a Number is Positive, Negative or 0 in Python

1
2
3
4
5
6
7
8
9
 
num = float(input("Enter a number: "))
if num > 0:
   print("Positive number")
elif num == 0:
   print("Zero")
else:
   print("Negative number")
 

How to Check if a Number is Odd or Even in Python

1
2
3
4
5
6
7
8
9
10
 
# Python program to check if the input number is odd or even.
# A number is even if division by 2 give a remainder of 0.
# If remainder is 1, it is odd number.
num = int(input("Enter a number: "))
if (num % 2) == 0:
   print("{0} is Even".format(num))
else:
   print("{0} is Odd".format(num))
 

How to Check Leap Year in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
# Python program to check if the input year is a leap year or not
 
year = int(input("Enter a year: "))
 
if (year % 4) == 0:
   if (year % 100) == 0:
       if (year % 400) == 0:
           print("{0} is a leap year".format(year))
       else:
           print("{0} is not a leap year".format(year))
   else:
       print("{0} is a leap year".format(year))
else:
   print("{0} is not a leap year".format(year))
 

How to Find the Largest Among Three Numbers in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
# Python program to find the largest number among the three input numbers
 
# change the values of num1, num2 and num3 for a different result
 
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
num3 = float(input("Enter third number: "))
 
if (num1 >= num2) and (num1 >= num3):
   largest = num1
elif (num2 >= num1) and (num2 >= num3):
   largest = num2
else:
   largest = num3
 
print("The largest number between",num1,",",num2,"and",num3,"is",largest)
 

How to Check Prime Number in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
# Python program to check if the input number is prime or not
 
num = int(input("Enter a number: "))
 
# prime numbers are greater than 1
if num > 1:
   # check for factors
   for i in range(2,num):
       if (num % i) == 0:
           print(num,"is not a prime number")
           print(i,"times",num//i,"is",num)
           break
   else:
       print(num,"is a prime number")
      
# if input number is less than
# or equal to 1, it is not prime
else:
   print(num,"is not a prime number")
 




How to Print all Prime Numbers in an Interval in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Python program to display all the prime numbers within an interval
 
# change the values of lower and upper for a different result
 
lower = int(input("Enter lower range: "))
upper = int(input("Enter upper range: "))
 
print("Prime numbers between",lower,"and",upper,"are:")
 
for num in range(lower,upper + 1):
   # prime numbers are greater than 1
   if num > 1:
       for i in range(2,num):
           if (num % i) == 0:
               break
       else:
           print(num)
 

How to Find the Factorial of a Number in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
# Python program to find the factorial of a number provided by the user.
 
 
 
 
num = int(input("Enter a number: "))
 
factorial = 1
 
# check if the number is negative, positive or zero
if num < 0:
   print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
   print("The factorial of 0 is 1")
else:
   for i in range(1,num + 1):
       factorial = factorial*i
   print("The factorial of",num,"is",factorial)
 

How to Display the multiplication Table in Python

1
2
3
4
5
6
7
8
 
# To take input from the user
num = int(input("Display multiplication table of? "))
 
# use for loop to iterate 10 times
for i in range(1, 11):
   print(num,'x',i,'=',num*i)
 

How to Print the Fibonacci sequence in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# Program to display the Fibonacci sequence up to n-th term where n is provided by the user
#take input from the user
nterms = int(input("How many terms? "))
 
# first two terms
n1 = 0
n2 = 1
count = 0
 
# check if the number of terms is valid
if nterms <= 0:
   print("Please enter a positive integer")
elif nterms == 1:
   print("Fibonacci sequence upto",nterms,":")
   print(n1)
else:
   print("Fibonacci sequence upto",nterms,":")
   while count < nterms:
       print(n1,end=' , ')
       nth = n1 + n2
       # update values
       n1 = n2
       n2 = nth
       count += 1
 

How to Check Armstrong Number in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
# Python program to check if the number provided by the user is an Armstrong number or not
# take input from the user
num = int(input("Enter a number: "))
# initialize sum
sum = 0
# find the sum of the cube of each digit
temp = num
while temp > 0:
   digit = temp % 10
   sum += digit ** 3
   temp //= 10
# display the result
if num == sum:
   print(num,"is an Armstrong number")
else:
   print(num,"is not an Armstrong number")
 




How to Find Armstrong Number in an Interval in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
# Program to check Armstrong numbers in certain interval
 
# To take input from the user
lower = int(input("Enter lower range: "))
upper = int(input("Enter upper range: "))
 
for num in range(lower, upper + 1):
 
   # order of number
   order = len(str(num))
    
   # initialize sum
   sum = 0
 
   # find the sum of the cube of each digit
   temp = num
   while temp > 0:
       digit = temp % 10
       sum += digit ** order
       temp //= 10
 
   if num == sum:
       print(num)
 

How to Find the Sum of Natural Numbers in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
# Python program to find the sum of natural numbers up to n where n is provided by user
 
#to take input from the user
num = int(input("Enter a number: "))
 
if num < 0:
   print("Enter a positive number")
else:
   sum = 0
   # use while loop to iterate un till zero
   while(num > 0):
       sum += num
       num -= 1
   print("The sum is",sum)
 

How to Display Powers of 2 Using Anonymous Function in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
# Python Program to display the powers of 2 using anonymous function
 
#to take number of terms from user
terms = int(input("How many terms? "))
 
# use anonymous function
result = list(map(lambda x: 2 ** x, range(terms)))
 
# display the result
 
print("The total terms is:",terms)
for i in range(terms):
   print("2 raised to power",i,"is",result[i])
 

How to Find Numbers Divisible by Another Number in Python

1
2
3
4
5
6
7
8
9
10
11
12
 
# Python Program to find numbers divisible by fifteen from a list using anonymous function
 
# Take a list of numbers
my_list = [300, 45, 65, 12, 77, 145, 5,]
 
# use anonymous function to filter
result = list(filter(lambda x: (x % 15 == 0), my_list))
 
# display the result
print("Numbers divisible by 13 are",result)
 

How to Convert Decimal to Binary, Octal and Hexadecimal in Python

1
2
3
4
5
6
7
8
9
10
11
 
# Python program to convert decimal number into binary, octal and hexadecimal number system
 
# Change this line for a different result
dec = int(input("Enter a decimal number "))
 
print("The decimal value of",dec,"is:")
print(bin(dec),"in binary.")
print(oct(dec),"in octal.")
print(hex(dec),"in hexadecimal.")
 

How to Find ASCII Value of Character in Python

1
2
3
4
5
6
7
8
 
# Program to find the ASCII value of the given character
 
#to take character from user
c = input("Enter a character: ")
 
print("The ASCII value of '" + c + "' is",ord(c))
 

How to Find HCF or GCD in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# Python program to find the H.C.F of two input number
 
# define a function
def computeHCF(x, y):
 
# choose the smaller number
    if x > y:
        smaller = y
    else:
        smaller = x
    for i in range(1, smaller+1):
        if((x % i == 0) and (y % i == 0)):
            hcf = i
            
    return hcf
 
# take input from the user
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
 
print("The H.C.F. of", num1,"and", num2,"is", computeHCF(num1, num2))
 

How to Find LCM in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
# Python Program to find the L.C.M. of two input number
 
# define a function
def lcm(x, y):
   """This function takes two
   integers and returns the L.C.M."""
 
   # choose the greater number
   if x > y:
       greater = x
   else:
       greater = y
 
   while(True):
       if((greater % x == 0) and (greater % y == 0)):
           lcm = greater
           break
       greater += 1
 
   return lcm
 
#to take input from the user
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
 
print("The L.C.M. of", num1,"and", num2,"is", lcm(num1, num2))
 




How to Find Factors of Number in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
# Python Program to find the factors of a number
 
# define a function
def print_factors(x):
   # This function takes a number and prints the factors
 
   print("The factors of",x,"are:")
   for i in range(1, x + 1):
       if x % i == 0:
           print(i)
 
#to take input from the user
num = int(input("Enter a number: "))
 
print_factors(num)
 

How to Make a Simple Calculator in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# Program make a simple calculator that can add, subtract, multiply and divide using functions
# This function adds two numbers
def add(x, y):
   return x + y
# This function subtracts two numbers
def subtract(x, y):
   return x - y
# This function multiplies two numbers
def multiply(x, y):
   return x * y
# This function divides two numbers
def divide(x, y):
   return x / y
print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")
# Take input from the user
choice = input("Enter choice(1/2/3/4):")
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
if choice == '1':
   print(num1,"+",num2,"=", add(num1,num2))
elif choice == '2':
   print(num1,"-",num2,"=", subtract(num1,num2))
elif choice == '3':
   print(num1,"*",num2,"=", multiply(num1,num2))
elif choice == '4':
   print(num1,"/",num2,"=", divide(num1,num2))
else:
   print("Invalid input")
 

How to Display Calendar in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
 
# Python program to display calendar of given month of the year
 
# import module
import calendar
 
# To ask month and year from the user
yy = int(input("Enter year: "))
mm = int(input("Enter month: "))
 
# display the calendar
print(calendar.month(yy, mm))
 

How to Display Fibonacci Sequence Using Recursion in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# Python program to display the Fibonacci sequence up to n-th term using recursive functions
 
def recur_fibo(n):
   """Recursive function to
   print Fibonacci sequence"""
   if n <= 1:
       return n
   else:
       return(recur_fibo(n-1) + recur_fibo(n-2))
 
 
#to take input from the user
nterms = int(input("How many terms? "))
 
# check if the number of terms is valid
if nterms <= 0:
   print("Plese enter a positive integer")
else:
   print("Fibonacci sequence:")
   for i in range(nterms):
       print(recur_fibo(i))
 

How to Find Sum of Natural Numbers Using Recursion in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Python program to find the sum of natural numbers up to n using recursive function
 
def recur_sum(n):
   """Function to return the sum
   of natural numbers using recursion"""
   if n <= 1:
       return n
   else:
       return n + recur_sum(n-1)
 
#to take input from the user
num = int(input("Enter a number: "))
 
if num < 0:
   print("Enter a positive number")
else:
   print("The sum is",recur_sum(num))
 

How to Find Factorial of Number Using Recursion in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# Python program to find the factorial of a number using recursion
 
def recur_factorial(n):
   """Function to return the factorial
   of a number using recursion"""
   if n == 1:
       return n
   else:
       return n*recur_factorial(n-1)
 
#to take input from the user
num = int(input("Enter a number: "))
 
# check is the number is negative
if num < 0:
   print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
   print("The factorial of 0 is 1")
else:
   print("The factorial of",num,"is",recur_factorial(num))
 




How to Convert Decimal to Binary Using Recursion in Python

1
2
3
4
5
6
7
8
9
10
11
12
 
def convertToBinary(n):
   # Function to print binary number for the input decimal using recursion
   if n > 1:
       convertToBinary(n//2)
   print(n % 2,end = '')
 
# decimal number
dec = int(input("Enter a number:"))
 
convertToBinary(dec)
 

How to Add Two Matrices in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# Program to add two matrices using nested loop
 
X = [[5, 7, 13],
    [41, 5, 16],
    [47, 5, 19]]
 
Y = [[5 ,5 ,1],
    [6  ,4 ,3],
    [4  ,4 ,9]]
 
result = [[0,0,0],
         [0,0,0],
         [0,0,0]]
 
# iterate through rows
for i in range(len(X)):
   # iterate through columns
   for j in range(len(X[0])):
       result[i][j] = X[i][j] + Y[i][j]
 
for r in result:
   print(r)
 

How to Transpose a Matrix in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Program to transpose a matrix using nested loop
 
X = [[12,7],
    [42 ,5],
    [32 ,8]]
 
result = [[0,0,0],
         [0,0,0]]
 
# iterate through rows
for i in range(len(X)):
   # iterate through columns
   for j in range(len(X[0])):
       result[j][i] = X[i][j]
 
for r in result:
   print(r)
 

How to Multiply Two Matrices in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
# Program to multiply two matrices using nested loops
 
# 3x3 matrix
X = [[12,7,3],
    [4 ,5,6],
    [7 ,8,9]]
# 3x4 matrix
Y = [[5,8,1,2],
    [6,7,3,0],
    [4,5,9,1]]
# result is 3x4
result = [[0,0,0,0],
         [0,0,0,0],
         [0,0,0,0]]
 
# iterate through rows of X
for i in range(len(X)):
   # iterate through columns of Y
   for j in range(len(Y[0])):
       # iterate through rows of Y
       for k in range(len(Y)):
           result[i][j] += X[i][k] * Y[k][j]
 
for r in result:
   print(r)
 

How to Check Whether a String is Palindrome or Not in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Program to check if a string
#  is palindrome or not
 
# change this value for a different output
my_str = 'ababa'
 
# make it suitable for caseless comparison
my_str = my_str.casefold()
 
# reverse the string
rev_str = reversed(my_str)
 
# check if the string is equal to its reverse
if list(my_str) == list(rev_str):
   print(my_str," is palindrome")
else:
   print(my_str," is not palindrome")
 

How to Remove Punctuations From a String in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
# define punctuation
punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~'''
 
 
# To take input from the user
my_str = input("Enter a string: ")
 
# remove punctuation from the string
no_punct = ""
for char in my_str:
   if char not in punctuations:
       no_punct = no_punct + char
 
# display the unpunctuated string
print(no_punct)
 

How to Sort Words in Alphabetic Order in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Program to sort alphabetically the words form a string provided by the user
 
 
#to take input from the user
my_str = input("Enter a string: ")
 
# breakdown the string into a list of words
words = my_str.split()
 
# sort the list
words.sort()
 
# display the sorted words
 
print("The sorted words are:")
for word in words:
   print(word)
 

How to Illustrate Different Set Operations in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# Program to perform different set operations like in mathematics
 
# define three sets
E = {0, 2, 4, 6, 8};
N = {1, 2, 3, 4, 5};
 
# set union
print("Union of E and N is",E | N)
 
# set intersection
print("Intersection of E and N is",E & N)
 
# set difference
print("Difference of E and N is",E - N)
 
# set symmetric difference
print("Symmetric difference of E and N is",E ^ N)
 

How to Count the Number of Each Vowel in Python

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# Program to count the number of each vowel in a string
 
# string of vowels
vowels = 'aeiou'
 
#to take input from the user
ip_str = input("Enter a string: ")
 
# make it suitable for caseless comparisions
ip_str = ip_str.casefold()
 
# make a dictionary with each vowel a key and value 0
count = {}.fromkeys(vowels,0)
 
# count the vowels
for char in ip_str:
   if char in count:
       count[char] += 1
 
print(count)
 

You may also like

Leave a Comment