CODEWITHSUNDEEP
pythonarrayspython-3.xfor-loopsum
D. Leigh
D. Leigh

Reputation: 53

Summing a 2d array in Python 3.x

new to programming and Python, using Python 3.x, I have to create a function that adds all the elements in a 2D array, the function should return the addition of all the elements of an array. I have to use 2 for loops to traverse the array and add up all the elements and I can't use any summing functions.

This is what I have so far but it is not functional

def add2D(array):
    for row in array:
        for entry in row:
            print(entry, end='  ')
        print()

    sum = 0
    for row in array (len(input)):
        for col in array(len(input[0])-1):
            sum = sum + input[row][col]
return sum

Can anyone tell me what I'm doing wrong.

Upvotes: 1

Views: 719

Answers (2)

Riet
Riet

Reputation: 1290

You almost had it. Here's a working version

def add2D(array):
    for row in array:
        for entry in row:
            print(entry, end='  ')
        print()

    sum = 0
    for row in array:
        for col in row:
            sum = sum + col
    return sum

Upvotes: 0

Ahasanul Haque
Ahasanul Haque

Reputation: 11134

Avoid using range where possible. Below one should work. First iterate over every innerList and then traverse every element of the innerList and add them with your sum variable.

def add2D(array):
    sum=0
    for row in array:
        for num in row:
            sum+=num
     return sum

Upvotes: 1

Related Questions