# Python Program to Find Sum of Numpy Array

Write a Python Program to Find the sum of numpy array items. The numpy sum function returns the sum of all the array items. We use this sum function on an integer array.

```import numpy as np

arr = np.array([10, 20, 40, 70, 90])

total = sum(arr)

print("The Sum of Total Array Item = ", total)```

The sum of Python Numpy Array items using sum function output

``The Sum of Total Array Item =  230``

It allows the user to enter the numpy ndarray size and the items. Next, we used the numpy sum function to get the sum of those array items.

```import numpy as np

arrSumList = []
number = int(input("Enter the Total Array Items = "))
for i in range(1, number + 1):
value = int(input("Enter the %d Array value = " %i))
arrSumList.append(value)

intarrSum = np.array(arrSumList)

total = sum(intarrSum)

print("The Sum of Total Array Item = ", total)```

The Numpy Array items sum output

``````Enter the Total Array Items = 4
Enter the 1 Array value = 20
Enter the 2 Array value = 5090
Enter the 3 Array value = 20
Enter the 4 Array value = 54
The Sum of Total Array Item =  5184``````

## Python Program to Find Sum of Numpy Array using For Loop range.

In this for loop (for i in range(len(sumArr))), i value iterate from array index position 0 to length of this sumArr. Within this for loop, we are adding each item to the total (total = total + sumArr[I]).

```import numpy as np

sumArr = np.array([10, 60, 30, 40, 70, 95])
total = 0
for i in range(len(sumArr)):
total = total + sumArr[i]

print("The Sum of Total Array Item = ", total)```
``The Sum of Total Array Item =  305``

In this numpy example, the for loop (for num in sumArr) iterate the actual array items, not the index position, and adds those items.

```import numpy as np

sumArr = np.array([10, 30, 50, 70, 90, 120, 150])
total = 0
for num in sumArr:
total = total + num

print("The Sum of Total Array Item = ", total)```
``The Sum of Total Array Item =  520``

Python Program to Calculate the Sum of Numpy Array items or elements using While loop.

```import numpy as np

sumArr = np.array([15, 66, 125, 30, 50, 95])
total = 0
i = 0

while (i < len(sumArr)):
total = total + sumArr[i]
i = i + 1

print("The Sum of Total Array Item = ", total)```