Can someone explain this Loop?

num = 0;

L= randperm(10);

for k = L

while L(k)<4

num = num + 1;

L(k) = L(k)+1;

end

end

num = 6 is the answer

Can someone explain why it is 6? Not 3, 4 , or 5?

Answer 1

[James Tursa]

Of the numbers 1 ... 10 that get produced by the randperm( ) call, only three of them are less than 4: 1, 2, 3.

1 will cause num to increase three times

2 will cause num to increase two times

3 will cause num to increase one time

three + two + one = 6