4 the sum of scores


#1

Hello!

def grades_sum(scores):
total=0
for i in scores:
total = total + i
return total
print grades_sum(grades)

Just curious if someone could help me to understand what the code means specific defined step by step,
for example total=0?
and total = total + i means?
and what does the i means in for i in scores?


#2

@caktuz,

# A =list= of grades
grades=[1,6,7,1,5,1]

#defining the FUNCTION grades_sum()
#which has 1 PARAMETER =scores=
def grades_sum(scores):
    #we initialize a VARIABLE =total= with VALUE 0
    total=0
    # for every ELEMENT of a =list= scores
    # at every iteration the ELEMENT-VALUE is in =i=
    for i in scores:
        #extra indentation to indicate FOR code-block
        # we ADD the ELEMENT-VALUE =i= to the VARIABLE =total=
        total = total + i
    #this indentation
    #is the indicator of the END of the FOR-IN loop
    #we will want to RETURN the =total= VALUE
    return total

#as a FUNCTION which uses the RETURN statement
#will return a Result with NO-Display
#we use the PRINT statement upfron of the =call= on the FUNCTION
#we also provide an ARGUMENT which is the =grades= list
print grades_sum(grades)

[output]
21

#3

@caktuz,

the FUNCTION talk

def myFunc( param1, param2):
    # Begin of =myFunc= FUNCTION-BODY
    # this =myFunc= function- has 2 PARAMETERS param1 and param2
    # param1 and param2 PARAMETERS are used 
    # as -local- VARIABLES throughout the =myFunc= FUNCTION-BODY
    print( param1 + " and " + param2 )
    #End of =myFunc= FUNCTION-BODY

If you want to call/execute the myFunc function
you will have to add a pair of parentheses to myFunc
like
myFunc()
As the myFunc function was defined
as having 2 parameters
you have to provide 2 arguments
in our case 2 string VALUES "Alena" and "Lauren"
like
myFunc("Alena","Lauren")

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++ function with 1 parameter using return-statement

def myFunction( param1 ):
    # //Begin of =myFunction= FUNCTION-BODY
    # //=myFunction= function has 1 PARAMETER param1
    # //this param1 PARAMETER is used as a -local- VARIABLE
    # //throughout the =myFunction= FUNCTION-BODY
    return param1;
    # //End of FUNCTION-BODY

You have defined a myFunction function
which takes 1 parameter param1
this param1 parameter is used
as a variable throughout the =myFunction= FUNCTION-BODY.

If you want to call/execute this myFunction function
and this myFunction function was defined
as having 1 parameter param1
you will have to provide 1 argument
in our case a "number VALUE" 4
myFunction( 4 )

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

============================================

As you are using the return-statement in your myFunction function
you will only get a return-value no-display.
You can however capture this return-value in a variable
and then use the print-method to do a display.

theResult = myFunction( 4 )
print theResult

OR directly

print myFunction( 4 )

#4

Ty m8 :*
Ty m8 :*
Ty m8 :*