Python Program to Find Sum of Even and Odd Numbers in an Array

Write a Python Program to Find Sum of Even and Odd Numbers in an Array using the for loop range. The if condition (if (evenOddSumArr[i] % 2 == 0)) checks the array item is divisible by two. If True, we add that array item to evnArrSum. Else add that array value to oddArrSum.

# Sum of Even and Odd in Array

import numpy as np

evenOddSumArr = np.array([10, 25, 199, 450, 70, 111, 190, 7])
evenArrSum = 0
oddArrSum = 0

for i in range(len(evenOddSumArr)):
    if (evenOddSumArr[i] % 2 == 0):
        evenArrSum = evenArrSum + evenOddSumArr[i]
    else:
        oddArrSum = oddArrSum + evenOddSumArr[i]

print("The Sum of Even Numbers in evenOddSumArr Array = ", evenArrSum)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddArrSum)

Python Program to Find Sum of Even and Odd Numbers in an Array

In this Python example, we used the for loop to iterate over the array items. The numpy mod and remainder functions check whether the remainder of each NumPy array item divided by two is equal to zero.

# Sum of Even and Odd in Array

import numpy as np

evenOddSumArr = np.array([10, 199, 14, 450, 170, 191, 200, 700])
evenArrSum = evenArrSum1 = evenArrSum2 = 0
oddArrSum = oddArrSum1 = oddArrSum2 = 0

for i in evenOddSumArr:
    if (i % 2 == 0):
        evenArrSum = evenArrSum + i
    else:
        oddArrSum = oddArrSum + i

print("The Sum of Even Numbers in evenOddSumArr Array = ", evenArrSum)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddArrSum)

print("\n=== Using mod function===")
for i in evenOddSumArr:
    if (np.mod(i, 2) == 0):
        evenArrSum1 = evenArrSum1 + i
    else:
        oddArrSum1 = oddArrSum1 + i

print("The Sum of Even Numbers in evenOddSumArr Array = ", evenArrSum1)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddArrSum1)

print("\n=== Using remainder function===")
for i in evenOddSumArr:
    if (np.remainder(i, 2) == 0):
        evenArrSum2 = evenArrSum2 + i
    else:
        oddArrSum2 = oddArrSum2 + i

print("The Sum of Even Numbers in evenOddSumArr Array = ", evenArrSum2)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddArrSum2)

The Sum of Even and Odd Numbers in a Numpy Array output. Refer to Python if else.

The Sum of Even Numbers in evenOddSumArr Array =  1544
The Sum of Odd Numbers in evenOddSumArr Array  =  390

=== Using mod function===
The Sum of Even Numbers in evenOddSumArr Array =  1544
The Sum of Odd Numbers in evenOddSumArr Array  =  390

=== Using remainder function===
The Sum of Even Numbers in evenOddSumArr Array =  1544
The Sum of Odd Numbers in evenOddSumArr Array  =  390

Python Program to Calculate the Sum of Even and Odd Numbers in an Array using the While loop.

# Sum of Even and Odd in Array

import numpy as np

evenOddSumArr = np.array([10, 25, 40, 75, 100, 125, 1100, 175])
i = 0
evenArrSum = evenArrSum1 = evenArrSum2 = 0
oddArrSum = oddArrSum1 = oddArrSum2 = 0

while (i < len(evenOddSumArr)):
    if (np.equal(evenOddSumArr[i] % 2, 0)):
        evenArrSum = evenArrSum + evenOddSumArr[i]
    else:
        oddArrSum = oddArrSum + evenOddSumArr[i]
    i = i + 1

print("The Sum of Even Numbers in evenOddSumArr Array = ", evenArrSum)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddArrSum)

The Sum of Numpy Array Even and Odd Numbers using a while loop output.

The Sum of Even Numbers in evenOddSumArr Array =  1250
The Sum of Odd Numbers in evenOddSumArr Array  =  400

In this numpy array example, we created a (SumEvenOddNumbers(evenOddSumArr)) function that returns the sum of Even numbers and odd numbers.

# Sum of Even and Odd in Array

import numpy as np

def SumEvenOddNumbers(evenOddSumArr):
    evenArrSum = 0
    oddArrSum = 0
    for i in evenOddSumArr:
        if (np.remainder(i, 2) == 0):
            evenArrSum = evenArrSum + i
        else:
            oddArrSum = oddArrSum + i

    return evenArrSum, oddArrSum


evenOddSumArr = np.array([10, 20, 25, 55, 100, 85, 200])
evensum, oddsum = SumEvenOddNumbers(evenOddSumArr)

print("The Sum of Even Numbers in evenOddSumArr Array = ", evensum)
print("The Sum of Odd Numbers in evenOddSumArr Array  = ", oddsum)

The Numpy Array even and odd sum using functions output

The Sum of Even Numbers in evenOddSumArr Array =  330
The Sum of Odd Numbers in evenOddSumArr Array  =  165

Program to find sum of even and odd numbers in an array using sum()

This program uses the built-in Numpy sum() function to calculate the sum of even and odd numbers in an array. Here, a % 2 == 0 retrieves even numbers, and a % 2 != 0 retrieves odd numbers. Next, we applied the sum (np.sum()) to them to get the result.

import numpy as np
a = np.array([10, 25, 199, 450, 70, 111, 190, 7])

ev_t = a[a % 2 == 0].sum()
print(ev_t)

od_t = a[a % 2 != 0].sum()
print(od_t)

720
342

This program uses the sum() method with the where parameter to filter the even and odd numbers. Next, sum() will calculate the total of the even and odd numbers.

import numpy as np
a = np.array([10, 25, 199, 450, 70, 111, 190, 7])

ev_t = np.sum(a, where = (a % 2 == 0))
print(ev_t)

od_t = np.sum(a, where = (a % 2 != 0))
print(od_t)

720
342

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