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)
