# 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