Sum of the integers from 1 to n

I’m trying to write a program to add up the numbers from 1 to n. I’ve managed to get it to print the numbers several times but not to add them all. It keeps on just adding two of the numbers.

My 1st attempt is:

def problem1_3(n):
    my_sum = 0
    while my_sum <= n:
        my_sum = my_sum + (my_sum + 1)
    print() 
    print(my_sum)

How can I fix this problem?

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^{For the recursive version of this question, see Recursive function to calculate sum of 1 to n?}

Answer

You need 2 different variables in your code — a variable where you can store the sum as you iterate through the values and add them (my_sum in my code), and another variable (i in my code) to iterate over the numbers from 0 to n.

def problem1_3(n):
    my_sum = 0
    i=0
    #replace this pass (a do-nothing) statement with your code
    while i <= n:
        my_sum = my_sum + i
        print(my_sum)
        i+=1
    return my_sum

You are using the my_sum variable in your code to both store the sum and iterate through the numbers.