Set-1

 Add two numbers 

num1 = 10
num2 = 20
sum = num1 + num2
print("Sum of {0} and {1} is {2}" .format(num1, num2, sum))

Adding two number provided by user input

# Python3 program to add two numbers 
number1 = input("First number: ") 
number2 = input("\nSecond number: ") 

sum = float(number1) + float(number2) 

print("The sum of {0} and {1} is {2}" .format(number1, number2, sum)) 

Find the sum of an element of List

# creating a list
list1 = [11, 5, 17, 18, 23,10]
num= len(list1)
total=0
for i in range(0,num):
    total=total+list1[i]

# printing total value
print("Sum of all elements in given list: ", total)

Python Program to count the occurrence of vowel in the given string

string = "Python is a programming Language"

vowels = "aeiou"

counts = {}

for char in string:

    if char.lower() in vowels:

        if char.lower() not in counts:

            counts[char.lower()] = 1

        else:

            counts[char.lower()] += 1

print("The counts of vowels in the string are:")

print(counts)

for vowel, count in counts.items():

    print(vowel, ": ", count)

Python Program to count the number of lowercase characters and uppercase characters in a string.

def count_upper_lower(string):

  count1=0

  count2=0

  for i in string:

    if i.isupper():

      count1 += 1

    elif i.islower():

      count2 += 1

  return count1,count2

string="Hello How are you"      

count1,count2 = count_upper_lower(string)    

  

print(len(string))

print(f"Uppercase count : {count1}")

print(f"Uppercase count : {count2}")