Important programs

1. Program to sort 3 numbers in descending order using if-else statements

a = int(input( "Enter first number: " ))

b = int(input( "Enter second number: " ))

c = int(input( "Enter third number: " ))

if a>b:

    if b>c:

        print( "Numbers in sorted order:" ,a, " " ,b, " " ,c)

    else :

        if c>a:

            print( "Numbers in sorted order:" ,c, " " ,a, " " ,b)

        else :

            print( "Numbers in sorted order:" ,a, " " ,c, " " ,b)

elif b>a:

    if a>c:

          print( "Numbers in sorted order:" ,b, " " ,a, " " ,c)

    else :

            print( "Numbers in sorted order:" ,b, " " ,c, " " ,a)

else :

    print( "Numbers in sorted order:" ,c, " " ,b, " " ,a)

Output:

2. Program to generate the pattern given below by accepting the input number from user

num = int(input( "Enter a number to generate its pattern = " ))

for i in range( 1 ,num + 1 ):

    for j in range( 1 ,i + 1 ):

        print(j, end = " " )

    print()

Output:

3. Program to find sum of series

(1*1) + (2*2) + (3*3) + (4*4) + (5*5) + … + (n*n)

num = int(input( "Enter value for n = " ))

sum= 0

for i in range( 1 , num + 1 ):

        sum += (i * i)

print( "Sum of series = " ,sum)

Output:

4. Program to find factorial of a given number

num = int(input( "Enter a number: " ))

fact = 1

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 ):

        fact = fact * i

print("factorial of ", num, " is ", fact)

Output: