Using the Built-in Function, sum()

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Reference: Python Library - Built-in Functions

The list myFloats holds 6 floating point numbers.
There is no loop.   total is set using the built-in sum() function.
myFloats = [4.5, 2.6, 3.8, 3.5, 1.0, 5.7]


total = sum(myFloats)


print(total)
total = round(total, 1)
print(total)
       
21.099999999999998

21.1
total is the sum of all the floating point numbers.
total is rounded to 1 decimal place to hide rounding error.