The topic of sum a list of float numbers in Python is relatively easy because in Python, there is support for built-in functions to do this. For example, the math library’s fsum function and the sum function, or you can use a for loop to sum a list of float numbers. Read the following article to understand more.
Sum a list of float numbers in Python
Use the math.fsum function
Syntax:
math.fsum(iterable)
Parameters:
- iterable: Required parameter. Iterable objects such as lists or tuple.
The math.fsum function returns the sum of the elements of an iterable object (like list or tuple).
Note: If the arguments passed to the function are iterable objects other than numbers, the function will return a TypeError.
Example:
- List of floats.
- Use the math.fsum to sum the floats in a list.
import math
foatList=[1.2, 2.4, 1.0, 0.0, 4.2, 0.25]
# Use the math.fsum to sum the floats in a list.
result = math.fsum(foatList)
print('Sum of floats in the list:', result)Output:
Sum of floats in the list: 9.05If the elements in your list are not floats yet, you can use the map function to convert all the elements in the list to floats.
Syntax:
map(func,iterable)
Parameters:
- func: given function to iterate over the elements of iterable.
- iterable: the object you want to browse.
Example:
- List of integers and floats.
- Use the map function to convert the elements in the list to float.
- Use the sum to sum the floats in a list.
import math
foatList=[1.2, 2.4, 1, 0, 4.2, 0.25]
# Use the map function to convert the elements in the list to float.
foatList = map(float, foatList)
# Use the math.fsum to sum the floats in a list.
result = math.fsum(foatList)
print('Sum of floats in the list:', result)Output:
Sum of floats in the list: 9.05Use the sum function
You can use the sum function to sum the floats in the list. The sum function has the same function and syntax as the fsum function in the math library.
Example:
- List of floats.
- Use the sum to sum the floats in a list.
foatList=[1.2, 2.4, 1.0, 0.0, 4.2, 0.25]
# Use the sum to sum the floats in a list.
result = sum(foatList)
print('Sum of floats in the list:', result)Output:
Sum of floats in the list: 9.05If the elements in your list are not floats yet, you can use the map function to convert all the elements in the list to floats.
Example:
- List of integers and floats.
- Use the map function to convert the elements in the list to float.
- Use the sum to sum the floats in a list.
foatList=[1.2, 2.4, 1, 0, 4.2, 0.25]
# Use the map function to convert the elements in the list to float.
foatList = map(float, foatList)
# Use the sum to sum the floats in a list.
result = sum(foatList)
print('Sum of floats in the list:', result)Output:
Sum of floats in the list: 9.05Use the for loop
Example:
foatList=[1.2, 2.4, 1.0, 0.0, 4.2, 0.25]
result = 0
for x in foatList:
result = result + x
print('Sum of floats in the list:', result)Output:
Sum of floats in the list: 9.05Summary
Those are three ways to sum a list of float numbers in Python. This topic is simple, so you can use all three methods above. Thank you for reading the article. If you have any suggestions, leave us a comment below, and we will try to answer.
Maybe you are interested:
- Calculate sum using a list comprehension in Python
- Sum the integers from 1 to n in Python
- Add zeros to a float after the decimal in Python
My name is Jason Wilson, you can call me Jason. My major is information technology, and I am proficient in C++, Python, and Java. I hope my writings are useful to you while you study programming languages.
Name of the university: HHAU
Major: IT
Programming Languages: C++, Python, Java
