adding and variable assignment in Python

Question

def sumOfStudentDigits():  
    studentdigit = (studentdigit1 + studentdigit2 + studentdigit3 + studentdigit4 + studentdigit5 + studentdigit6 + studentdigit7)

    studentdigit1=3 studentdigit2=6 studentdigit3=9 studentdigit4=3 
           studentdigit5=1 studentdigit6=0 studentdigit7=0

I need to assign seven digits to seven variables and add them together.

Answer 1

If your confusion is how to get the studentdigits into your function, you can pass them into the function like this:

def sumOfStudentDigits(studentdigit1, studentdigit2, studentdigit3,
                       studentdigit4, studentdigit5, studentdigit6,
                       studentdigit7):
    studentdigit = (studentdigit1
                    + studentdigit2
                    + studentdigit3
                    + studentdigit4
                    + studentdigit5
                    + studentdigit6
                    + studentdigit7)

My advice would be to have all those digits stored in a list, and then pass merely that list to the function, then iterate over the list:

listofdigits = [studentdigit1,
                studentdigit2,
                studentdigit3,
                studentdigit4,
                studentdigit5,
                studentdigit6,
                studentdigit7]

def sumOfStudentDigits(studentdigitlist):
    sum = 0
    for digit in studentdigitlist:
        sum += digit
        return sum

print(sumOfStudentDigits(listofdigits))

We have to set sum = 0 before we can use sum because python wants to know what sum is before it uses it, so we assign it 0 so that we can count up from there. Notice how studentdigitlist and listofdigits are different? You can pass a list of any name to the function, all that matters is that you use the variable (ie a list in this case) name that you have used in def myfunction(yourvariable): throughout the function definition. Python with substitute whatever you pass into the function for where you have that placeholder name within the function. Then when you run the function: eg

def myfunction(yourvariable):
    # do stuff with yourvariable
    myvariable = myvariable + 7

somenumber = 2
myfunction(somenumber)
# now somenumber will equal 9

Answer 2

You could also pass in the entire student number and break it down inside of your function.

def sum_student_digits(student_id):
    running_total = 0

    for i in str(student_id):
        running_total += int(i)

    return running_total

print(sum_student_digits(12345))

Answer 3

Keeping things basic. You need to assign the seven digit student number, one to each variable.

def sumOfStudentDigits():  
    digit1 = 3
    digit2 = 6
    digit3 = 9
    digit4 = 3
    digit5 = 1
    digit6 = 0
    digit7 = 0

And then add them together:

    print(digit1 + digit2 + digit3 + digit4 + digit5 + digit6 + digit7)

Note that the variable assignments can't be on the same line, and need to come before the sum.