count first list elements whith index

April 2, 2022

import random
n=[0]*7
for i in range(7):
    n[i]=random.randint(0,99)
print(*n,sep=' ')
summa=0
for i in range(7):
    if n.index(7)<4:
        summa=summa+n[i]
print(summa)

Here is my code how i can count together first 4 elements of my list all i get is that the number in n.index is not in the list can somoune help like if it outputs numbers 12 43 43 2
56 98 71 i need to count together numbers 12+43+43+2 and then i need to multiply rest numbers that are left 56, 98 and 71
I have tried puting diffrent numbers in n.index but i get the same error

>Solution :

If you try to access index of 7 it will search for 7 which is a number not an index. Try this instead.

import random
n=[0]*7
for i in range(7):
    n[i]=random.randint(0,99)
    print(*n,sep=' ')
summa=0
prdct=1
for i in range(7):
    if n.index(n[i])<4:
    #calculate the sum of first 4 values
        summa=summa+n[i]
    else:
    #calculate the product of the rest values
        prdct=prdct*n[i]
print(summa)
print(prdct)