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Python Program to Find the Factorial of a Number  # Python program to find the factorial of a number provided by the user. # change the value for a different result num = 7 # uncomment to take input from 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)

Python Program to Print all Prime Numbers in an Interval  # Python program to display all the prime numbers within an interval # change the values of lower and upper for a different result lower = 800 upper = 1000 # uncomment the following lines to take input from the user #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) output: Prime numbers between 800 and 1000 are: 809 811 821 823 827 829 839 853 857 859 863 877 881 883 887 907 ...

Python Program to Check Prime Number # Python program to check if the input number is prime or not num = 407 # take input from the user # 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") output: 407 is not a prime number 11 times 37 is 407  In this program, variable num is checked if it's prime ...

Add Two Numbers Provided by The User # Store input numbers num1 = input ( 'Enter first number: ' ) num2 = input ( 'Enter second number: ' ) # 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:   Enter first number: 1.5 Enter second number: 6.3 The sum of 1.5 and 6.3 is 7.8

Python Program to Add Two Numbers # This program adds two numbers num1 = 1.5 num2 = 6.3 # 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 The sum of 1.5 and 6.3 is 7.8

Python Program to Print Hello world! # This program prints Hello, world! print('Hello, world!')