PROGRAM 1

Python script to print Hello World on screen

Printing a message on screen is very simple in Python programming. In Python you can print a message on screen with a single line of code (print statement).

# This prints Hello World on the output screen
print('Hello World')

Output:

Hello World

PROGRAM 2

Get String input from user

In this program we will see how to receive string input from user in Python.

# Python Program - Get String Input from User
str = input("Enter any string: ")
print(str)

Get Integer Input from user

# Python Program - Get Integer Input from User
num = int(input("Enter an Integer: "))
print(num)

Get Float Input from user

This is similar to what we have seen above, except that we use float() function to convert the received input into a float value.

# Python Program - Get Float Input from User
num = float(input("Enter a float value: "))
print(num)

PROGRAM 3

Python code

The user is asked to enter the number, the input number is stored in a variable number and then we have checked the number using if..elif..else statement.

# User enters the number
number = int(input("Enter number: "))

# checking the number
if number < 0: print("The entered number is negative.") elif number > 0:
    print("The entered number is positive.")
elif number == 0:
    print("Number is zero.")
else:
    print("The input is not a number")

Python Programs

Python program to do arithmetical operations

1.    # Store input numbers:
2.    num1 = input('Enter first number: ')
3.    num2 = input('Enter second number: ')
4.
5.    # Add two numbers
6.    sum = float(num1) + float(num2)
7.    # Subtract two numbers
8.    min = float(num1) - float(num2)
9.    # Multiply two numbers
10. mul = float(num1) * float(num2)
11. #Divide two numbers
12. div = float(num1) / float(num2)
13. # Display the sum
14. print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))
15.
16. # Display the subtraction
17. print('The subtraction of {0} and {1} is {2}'.format(num1, num2, min))
18. # Display the multiplication
19. print('The multiplication of {0} and {1} is {2}'.format(num1, num2, mul))
20. # Display the division
21. print('The division of {0} and {1} is {2}'.format(num1, num2, div))

Python program to find the area of a triangle

1 1.    # Three sides of the triangle is a, b and c:
2.    a = float(input('Enter first side: '))
3.    b = float(input('Enter second side: '))
4.    c = float(input('Enter third side: '))
5.
6.    # calculate the semi-perimeter
7.    s = (a + b + c) / 2
8.
9.    # calculate the area
10. area = (s*(s-a)*(s-b)*(s-c)) ** 0.5
11. print('The area of the triangle is %0.2f' %area)

Python program to solve quadratic equation

1 1.    # import complex math module
2.    import cmath
3.    a = float(input('Enter a: '))
4.    b = float(input('Enter b: '))
5.    c = float(input('Enter c: '))
6.
7.    # calculate the discriminant
8.    d = (b**2) - (4*a*c)
9.
10. # find two solutions
11. sol1 = (-b-cmath.sqrt(d))/(2*a)
12. sol2 = (-b+cmath.sqrt(d))/(2*a)
13. print('The solution are {0} and {1}'.format(sol1,sol2))

Python program to swap two variables

1.    # Python swap program
2.    x = input('Enter value of x: ')
3.    y = input('Enter value of y: ')
4.
5.    # create a temporary variable and swap the values
6.    temp = x
7.    x = y
8.    y = temp
9.
10. print('The value of x after swapping: {}'.format(x))
11. print('The value of y after swapping: {}'.format(y))

Python program to convert kilometers to miles

Here, we are going to see the python program to convert kilometers to miles. Let's understand kilometers and miles first.

Kilometer: The kilometer is a unit of length in the metric system. It is equivalent to 1000 meters.

Miles: Mile is also the unit of length. It is equal to 1760 yards.

Conversion formula:

1 kilometer is equal to 0.62137 miles.

1.    # Collect input from the user
2.    kilometers = float(input('How many kilometers?: '))
3.    # conversion factor
4.    conv_fac = 0.621371
5.    # calculate miles
6.    miles = kilometers * conv_fac
7.    print('%0.3f kilometers is equal to %0.3f miles' %(kilometers,miles))

Python program to convert Celsius to Fahrenheit

Conversion formula:

T(℉) = T(℃) x 9/5 + 32 Or, T(℉) = T(℃) x 1.8 + 32

1.    # Collect input from the user
2.    celsius = float(input('Enter temperature in Celsius: '))
3.
4.    # calculate temperature in Fahrenheit
5.    fahrenheit = (celsius * 1.8) + 32
6.    print('%0.1f  Celsius is equal to %0.1f degree Fahrenheit'%(celsius,fahrenheit))

Python program to display calendar

import calendar

And then apply the syntax

(calendar.month(yy,mm))

1.    import calendar
2.    # Enter the month and year
3.    yy = int(input("Enter year: "))
4.    mm = int(input("Enter month: "))
5.
6.    # display the calendar
7.    print(calendar.month(yy,mm))

Python Program to check if a Number is Positive, Negative or Zero

1.    num = float(input("Enter a number: "))
2.
3.    if num > 0:
4.    print("{0} is a positive number".format(num))
5.    elif num == 0:
6.       print("{0} is zero".format(num))
7.    else:
8.       print("{0} is negative number".format(num))

Python Program to Check if a Number is Odd or Even

1.    num = int(input("Enter a number: "))
2.    if (num % 2) == 0:
3.       print("{0} is Even number".format(num))
4.    else:
5.       print("{0} is Odd number".format(num))

Python Program to Check Leap Year

1.    year = int(input("Enter a year: "))
2.    if (year % 4) == 0:
3.       if (year % 100) == 0:
4.           if (year % 400) == 0:
5.               print("{0} is a leap year".format(year))
6.           else:
7.               print("{0} is not a leap year".format(year))
8.       else:
9.           print("{0} is a leap year".format(year))
10. else:
11.    print("{0} is not a leap year".format(year))

Python Program to Check Prime Number

Prime numbers:

A prime number is a natural number greater than 1 and having no positive divisor other than 1 and itself. For example: 3, 7, 11 etc are prime numbers.

Composite number:

Other natural numbers that are not prime numbers are called composite numbers.

For example: 4, 6, 9 etc. are composite numbers.

1.    num = int(input("Enter a number: "))
2.
3.    if num > 1:
4.       for i in range(2,num):
5.           if (num % i) == 0:
6.               print(num,"is not a prime number")
7.               print(i,"times",num//i,"is",num)
8.               break
9.       else:
10.        print(num,"is a prime number")
11.
12. else:
13.    print(num,"is not a prime number")

Python Program to Print all Prime Numbers between an Interval

1.    #Take the input from the user:
2.    lower = int(input("Enter lower range: "))
3.    upper = int(input("Enter upper range: "))
4.
5.    for num in range(lower,upper + 1):
6.       if num > 1:
7.           for i in range(2,num):
8.               if (num % i) == 0:
9.                   break
10.        else:
11.            print(num)

Python Program to Find the Factorial of a Number

1.    num = int(input("Enter a number: "))
2.    factorial = 1
3.    if num < 0:
4.       print("Sorry, factorial does not exist for negative numbers")
5.    elif num == 0:
6.       print("The factorial of 0 is 1")
7.    else:
8.       for i in range(1,num + 1):
9.           factorial = factorial*i
10.    print("The factorial of",num,"is",factorial)

Python Program to Display the multiplication Table

1. num = int(input("Show the multiplication table of? "))
2. # using for loop to iterate multiplication 10 times
3. for i in range(1,11):
4. print(num,'x',i,'=',num*i)

Python Program to Print the Fibonacci sequence

Fibonacci sequence:

The Fibonacci sequence specifies a series of numbers where the next number is found by adding up the two numbers just before it.

For example:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on....

1.    nterms = int(input("How many terms you want? "))
2.    # first two terms
3.    n1 = 0
4.    n2 = 1
5.    count = 2
6.    # check if the number of terms is valid
7.    if nterms <= 0:
8.       print("Plese enter a positive integer")
9.    elif nterms == 1:
10.    print("Fibonacci sequence:")
11.    print(n1)
12. else:
13.    print("Fibonacci sequence:")
14.    print(n1,",",n2,end=', ')
15.    while count < nterms:
16.        nth = n1 + n2
17.        print(nth,end=' , ')
18.        # update values
19.        n1 = n2
20.        n2 = nth
21.        count += 1

Python Program to Check Armstrong Number

Armstrong number:

A number is called Armstrong number if it is equal to the sum of the cubes of its own digits.

For example: 153 is an Armstrong number since 153 = 1*1*1 + 5*5*5 + 3*3*3.

The Armstrong number is also known as narcissistic number.

1.    num = int(input("Enter a number: "))
2.    sum = 0
3.    temp = num
4.
5.    while temp > 0:
6.       digit = temp % 10
7.       sum += digit ** 3
8.       temp //= 10
9.
10. if num == sum:
11.    print(num,"is an Armstrong number")
12. else:
13.    print(num,"is not an Armstrong number")

Python Program to Find Armstrong Number between an Interval

1.    lower = int(input("Enter lower range: "))
2.    upper = int(input("Enter upper range: "))
3.
4.    for num in range(lower,upper + 1):
5.       sum = 0
6.       temp = num
7.       while temp > 0:
8.           digit = temp % 10
9.           sum += digit ** 3
10.        temp //= 10
11.        if num == sum:
12.             print(num)

Python Program to Find the Sum of Natural Numbers

1.    num = int(input("Enter a number: "))
2.
3.    if num < 0:
4.       print("Enter a positive number")
5.    else:
6.       sum = 0
7.       # use while loop to iterate un till zero
8.       while(num > 0):
9.           sum += num
10.        num -= 1
11.    print("The sum is",sum)

PYTHON_CS_KV211

Sunday, July 29, 2018

PROGRAMS