MATLAB: Huw to create counter

for loop

"Counters are useful programming tools, for example, to keep track of how many times a command has been executed. Create a counter in the variable r and set it to 1. Then write a loop that increases for each turn on the counter by one and then adds the value of the counter to a sum. Save the sum to the variable sum. The loop should go between 1 and 10"
I've gotten this task and the starting code below. But I don't understand what to do? (Just learning matlab)
r = ?
sum = +
for k = ?
r ?
sum?
end

Best Answer

r = 0
summa = 0
for k=1:10
r = r+1
summa = summa + r
end