Question

Write a program that accepts three decimal numbers as input and outputs their sum​

Answer 1

Answer:

a = float(input("Enter an integer: "))

b = float(input("Enter an integer: "))

c = float(input("Enter an integer: "))

print (a + b + c)

Explanation:

Takes three numbers that user inputs and outputs their sum (of whatever numbers are given.)

Answer 2

Answer:

sum = 0.0

for i in range(0,3):

   sum += float(input("Enter a decimal number to sum: "))

print ("Sum: ", sum)

*** Sample Input ***

Enter a decimal number to sum: 1.1

Enter a decimal number to sum: 2.2

Enter a decimal number to sum: 3.3

*** Sample Output ***

Sum:  6.6

Explanation:

For this problem, a method was devised in python to create the sum of three individual decimal numbers.

The first line of code, sum = 0.0, initializes a variable to the float type in which we will store the value of our sum.  Note, it is initialized to 0.0 to start from a value of 0 and be considered a float.

The second line of code, for i in range(0,3):  is the creation of a for loop control structure.  This will allow us to repeat a process 3 amount of times using the iterator i, from value 0 to 3 in this case.  Note, 0 is inclusive and 3 is exclusive in the python range.  This means the for loop will iterate with, i=0, i=1, and i=2.

The third line of code, sum += float(input("Enter a decimal number to sum: "))  is simply asking the user for a number, taking that input and converting it from a string into a float, and then summing the value with the previous value of sum and saving that into sum.

The fourth line of code, print ("Sum: ", sum) is simply displaying the final value that was calculated by adding the three user inputs together which were stored into the variable sum.

Cheers.