# Introduction Python Fsum() Method with Examples math.fsum() method is a library method of math module, it is used to find the sum (in float) of the values of an iterable, it accepts an iterable object like an array, list, tuple, etc (that should contain numbers either integers or floats), and returns sum in float of all values.

math.fsum() method is a library method of math module, it is used to find the sum (in float) of the values of an iterable, it accepts an iterable object like an array, list, tuple, etc (that should contain numbers either integers or floats), and returns sum in float of all values.

Python Fsum()

### Syntax

``````    math.fsum(iterable)

``````

Here, the value can be a range or an iterable like an array, tuple.

### Parameters:

`iterable` – an iterable object like list, array, tuple, etc.

### Return value:

The fsum() function returns the sum of the iterable or range in floating-point number. ‘f’ in fsum() stands for float.

### Example 1

``````# Python code demonstrate example of
# math.fsum() method
import math

# iterable objects
a = range(10)   # a range object (0,10)
b = [10, 20, 30, 40, 50]    # list of integers
c = [10, 20, 30.30, 40, 50.0]   # list of integers & floats
d = [10.20, 30.40]  # list of floats
e = (10, 20, 30, 40.50) # tuple

# printing sum of all values of the iterable objects
print("fsum(a): ", math.fsum(a))
print("fsum(b): ", math.fsum(b))
print("fsum(c): ", math.fsum(c))
print("fsum(d): ", math.fsum(d))
print("fsum(e): ", math.fsum(e))

``````

Output

``````fsum(a):  45.0
fsum(b):  150.0
fsum(c):  150.3
fsum(d):  40.599999999999994
fsum(e):  100.5

``````

### Example 2

``````# app.py

#importing math library
import math

#Finding sum of a range first

#taking input from the user
x=int(input("Please enter a range up to which you want to sum: "))

#finding sum of the range using fsum()
print("Sum of the range is: ",math.fsum(range(x)))

#Finding sum of an iterable

#taking input of a list
print("Please enter array element with space separated integer: ")
arr=list(map(int,input().split(" ")))

#printing all array elements
print("All array elements are: ",arr)

#Finding sum of all the values using fsum()
print("Sum of all elements of the array is: ",math.fsum(arr))

``````

Output

``````Please enter a range up to which you want to sum: 15
Sum of the range is:  105.0
Please enter the array element with space-separated integer:
1 3 5 7
All array elements are:  [1, 3, 5, 7]
Sum of all elements of the array is:  16.0

``````

In this program, we first have an imported math library, and then we have taken an input integer from the user. After that, we have calculated the sum of all elements up to that number, and then we have printed that.

On the other hand, we have taken input for a list, where the user will have to given all list elements by a space. Then we have called fsum() to calculate the sum of all the list elements.

Python fsum() is one of the Python Math function that is used to calculate and return the sum of iterators like Tuples and Lists.

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