Magic numbers

IDSTAT-2
TitleDefine and document numeric values as variables before using them in an expression.
PriorityStrongly recommended
DescriptionDo not use magic numbers in your expression. Define them as variables before using them.
This encourages reuse and documentation of numerical constants and improves overall readability.
RationaleReadability, Reusability

Avoid:

for iPick = 1 : 52
    disp(randi(13));
end

Instead use:

DECK_SIZE   = 52;
N_VALUES    = 13;

for iPick = 1 : DECK_SIZE
    disp(randi(N_VALUES));
end